Commander R.N.R. (Retd.), Master Mariner, Younger Brother of Trinity House, Fellow of the Royal Institute of Navigation.
A.I. 1 Aberration
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Able Seaman 2 Absolute Temperature
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Absolute Total Loss 3 Account Position by
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Account of Wages Book 4 Actinozoa
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Action 5 Admiralty Coefficients
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Admiralty Court 6 Advance Freight
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Advance Note 7 After Sight
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After Swim 8 Aground
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Agulhas Current 9 Airy's Method
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Aitken's Nucleus Counter 10 Algol
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Alhena 11 Alow
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Alow and Aloft 12 Altostratus
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Alwaid 13 Ampere
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Ampere's Rule 14 Anchor Bed
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Anchor Bell 15 Angle Iron
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Angle of Cut 16 Anomalistic
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Anomalistic Month 17 Antipodes
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Antiscorbutics 18 Apparent Midnight
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Apparent Motion 19 Apse
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Aqualung 20 Arctic Circle
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Arctic Current 21 Armed Mast
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Armed Merchant Cruiser 22 Ascending Node
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Ascension 23 Astern
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Asteroids 24 Astronomical Twilight
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Astronomical Unit 25 Atria
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A-Trip 26 Australian Sea Carriage
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Autogenous Welding 27 Average Loss
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Average Statement 28 Azimuth
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Azimuthal Projection 29 Azores Anticyclone
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Babcock Erith Stoker 30 Backstaff
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Backstays 31 Balancing
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Balancing Band 32 Banjo Frame
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Bank 33 Barnacle Paint
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Barograph 34 Basking Shark
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Bateau 35 Bay Ice
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Bayou 36 Bear Away
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Bearding 37 Beaufort Wind Scale
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Becalmed 38 Bell
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Bellatrix 39 Beneaped
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Benetnasch 40 Bessel's Figure of Earth
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Best Bower 41 Bilge Keelson
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Bilge Piece 42 Bill of Sight
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Bill of Store 43 Bitt Head
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Bitting Cable 44 Blazer
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Bleed a Buoy 45 Blue Back
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Blue End 46 Board of Trade
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Board of Trade Enquiry 47 Boatswain's Call
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Boatswain's Chair 48 Bolide
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Bolinder Engine 49 Bonnet
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Booby Hatch 50 Borda's Circle
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Bore 51 Bourdon Gauge
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Bouse 52 Bow Shackle
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Bow Sheets 53 Brace Aback
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Brace In 54 'Breakage'
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Break Bulk 55 Breast Rope
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Breastwork 56 British Corporation
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British Ship 57 Brown Curtis Turbine
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Brown Gyro Compass 58 Bulgeway
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Bulk 59 Bunder Boat
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Bung 60 Burden
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Burdwood's Tables 61 Butt Joint
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Buttock 62 By the Wind
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C 63 Cable Nipper
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Cable Party 64 Calendar
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Calendar Line 65 Camel
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Cam Shaft 66 Canoe Rig
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Canopus 67 Cap a Rope
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Cape 68 Captain of Top
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Capture 69 Carmilhan
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Carney 70 Cassiopeia
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Cast 71 Catch Ratline
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Cat Davit 72 Caulk
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Caulker 73 Cement Box
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Centaur(us) 74 Centre of Oscillation
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Centre of Percussion 75 Certificate of Seaworthiness
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Cetacea 76 Chain Shot
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Chain Slings 77 Chapclling
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Characteristic 78 Chart Plate
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Charybdis 79 Chevils
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Chief Buffer 80 Chromatic Aberration
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Chromosphere 81 Circle of Perpetual Occultation
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Circle of Position 82 Clack Valve
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Clamp 83 Clearance
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Clearance Inward 84 Clew Garnet
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Clewline 85 Closed Traverse
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Close Fights 86 Clubbing
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Club Hauling 87 Coaster
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Coastguard 88 Cod of Track
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Cod's Head 89 Cold Wave
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Collapsible Boat 90 Column
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Colure 91 Commodore's Burgee
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Common Bend 92 Compass Correction
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Compass Course 93 Compression of (Earth's Axis).
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Compulsory Pilotage 94 Console Bracket
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Constant 95 Contraction of
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Contract Ticket 96 Coping
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Copper 97 Cormorant
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Corocore 98 Counter (Engine)
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Counter 99 Covering Strap
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Cowl 100 Crevasse
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Crew 101 Crosshead
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Crossing 102 Crown Knot
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Crown Plait 103 Cunningham Patent Topsail
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Cupola Ship 104 Cutlass
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Cut Splice 105 Cynosure
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Dabchick 106 Date Line
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Datum 107 Dead Man
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Dead Men's Eyes 108 Deck Hook
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Deck Light 109 Deep Sea Lead
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Deep Sea Leadline 110 Density
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Departure 111 Despatch Money
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Destination 112 Dhow
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Diacoustics 113 Dip
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Diphda 114 Discipline
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Disembark 115 Ditch
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Ditcher 116 Dock
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Dock Dues 117 Doldrums
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Dolphin 118 Double Tide
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Double Topsail 119 Draft
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Drag 120 Drift
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Drift Anchor 121 Drummer's Plait
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Dry Card Compass 122 Dunstos Rudder Brake
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Duration of Tide 123 Dysa
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'E' 124 Echo Box
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Echometer 125 Ekman Theory of Drift
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Elastic Coupling 126 Elliots Eye
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Ellipse 127 Engagement
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Engineer 128 Equal Altitudes
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Equation 129 Eyebrow
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Eyelet/Hole 130 Eye Splice
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Face Piece 131 Falcate
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Falconet 132 Fanal
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Fancy Line 133 Feather Spray
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Feed 134 Fid Hammer
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Fiducial Points 135 First Meridian
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First of Exchange 136 Fishing Boat
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Fishing Boat's Register 137 Flake
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Flaking a Mainsail 138 Flatten
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Flaw 139 Floating Dock
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Floating Harbour 140 Flute
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Fluted Shackle 141 Food Scale
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Foot (of Sail) 142 Forefoot
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Fore Ganger 143 Fore Topmast
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Forge 144 Foxon's Log
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Foy Boat 145 Free of Damage
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Free of Expense 146 Frigate
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Frigate Built 147 Full Scantling
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Fulmar 148 Futtock Timbers
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Gacrux 149 Gam
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Gambling Policy 150 Gear
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Geared Turbine 151 Geographical Latitude
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Geographical Mile 152 Girder
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Girder Strength 153 Gnomonic Projection
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Go About 154 Gorge
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Goring 155 Grain Space
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Grampus 156 Greek Fire
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Green Flash 157 Grounding
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Grounding Clause 158 Gulf Stream
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Gulf Weed 159 Gyration
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Gyro Compass 160 Gyrostat
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Haar 161 Half Mast
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Half Minute Glass 162 Hand Log
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Hand Mast 163 Harbour Log
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Harbour Master 164 Harpoon Depth Finder
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Harpoon Log 165 Hatch Money
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Hatch Rest Section 166 Hawser Laid
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Hawse Timber 167 Heave and Set
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Heave and Up Pawl 168 Height
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Height 169 High
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High and Dry 170 Hogshead
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Hoist 171 Honda Steels
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Honour Policy 172 Hornpipe
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Horns 173 Hour
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Hour Angle 174 Humidity
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Humidity-Mixing Ratio 175 Hydrographical
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Hydrographic Department 176 Hysteresis
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I Bar 177 Immersion
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Immigration Regulations 178 Index Error
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Index Glass 179 Initial Condensation
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Initial Stability 180 Insurance Policy
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Insurer/s 181 Intrinsic Energy
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Inversion 182 Isohel
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Isohyet 183 Ivory's Rule
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Jack 184 Japan Stream
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Jason Clause 185 Jib Iron
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Jib of Jibs 186 Julian Calendar
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Julian Day 187 Jury Mast Knot
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Jury Mat 188 Jury Steering Gear
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Kamal 189 Keel Blocks
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Keeler 190 Kentledge
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Kepler's Laws 191 Kites
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Knarr 192 Kynaston's Apparatus
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Label Clause 193 Lambda
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Lamp Trimmer 194 Laridae
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Larinae 195 Lay Aboard
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Lay a Hold 196 Leading Lights
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Leading Line 197 Lee Fange
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Lee Gauge 198 Let Draw
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Let Go 199 Liberation in Longitude
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Liburnian 200 Life-Saving Apparatus
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Life-Saving Appliances 201 Lightning
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Lightning Conductor 202 Line Fisher
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Line of Battle Ship 203 Liverpool Hook
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Liverpool Pantiles 204 Lloyd's Register
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Lloyd's Signal Stations 205 Loft Template Method
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Log 206 Long Glass
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Longitude 207 Looming
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Loop of Retrogression 208 Low-Water
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Lowitz Arc 209 Lump Sum Charter
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Lump Sum Freight 210 Lyra
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Mackerel Sky 211 Magnetic Needle
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Magnetic Poles 212 Mail Steamer
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Main 213 Making Her Number
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Making Iron 214 Manilla Hemp
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Manilla Rope 215 Margin Plate
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Marina 216 'Marine Surveyor'
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Maritime 217 Marsden Square
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Mart 218 Master's Bond
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Master's Declaration 219 Matelot
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Mate's Log 220 Mean Solar Day
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Mean Solar Year 221 Menkalin
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Menkar 222 Merchant Service
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Merchant Shipping Acts 223 Meridional Projection
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Mermaid 224 Meteors
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Meteor Shower 225 Midship Body
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Midship Frame 226 Mitchboard
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Mixed Policy 227 Monkey Rail
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Monkey Seam 228 Mooring Swivel
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Moral Hazard 229 Mumbleby
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Mumford Boiler 230 Mystery Tables
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Nacodah 231 Nauropometer
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Nauscopy 232 Naval Court
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Naval Crown 233 Navis Tecta
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Naval Crown 233 Navis Tecta
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Navivium 234 Nettles
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Nettle Stuff 235 Nipped
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Nipper 236 Norfolk Wherry
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Normal Centre 237 Notice to Mariners
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Noting a Bill 238 Nutation
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Oakum 239 Ocean Plait
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Oceanus 240 Okta
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Old Dreadnought 241 Open Water
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Opposed Cylinder Engine 242 Oropesa Sweep
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Orrery 243 Overhand Knot
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Overhaul 244 Oya Siwo
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Packet 245 Palm and Needle
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Palowa 246 Parallel of Latitude
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Parallel of Position 247 Particular Charges
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Particular Lien 248 Pay Down
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Paying off Pendant 249 Pendant
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Pennant 250 Periscope
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Periscope Depth 251 Petty Average
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Petty Officer 252 Pillow
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Pilot 253 Pingle
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Pink 254 Pitch-pole
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Pitometer Log 255 Pledge
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Pleiades 256 Point of Tangency
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Polacre 257 Ponente
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Pontoon 258 Port Charges
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Port Clearanc 259 Positive Slip
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Post Captain 260 Preventer Bolts
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Preventer Fid 261 Prime Vertical
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Priming 262 Procyon
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Profile Draughts 263 Propeller
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Propeller Post 264 Proxima Centauri
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Proximate Clause 265 Purple Light
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Purse 266 Pyxis Nautica
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'Q' Ship 267 Quarter
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Quarter of Yard 268 Quartermaster
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Quarter Pieces 269 Quoin
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*R' 270 Radiation Pressure
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Radio 271 Raker
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Rakish 272 Rasalhague
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Rasin 273 Reckoning
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Recognition Signal 274 Reduction to Soundings
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Reduction to the Meridian 275 Peeving
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Peeving Beetle 276 Relative Bearing
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Relative Course 277 Reporting Day
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Report List 278 Reversal
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Reversed Frame 279 Riding Sail
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Riding Slip 280 Right the Helm
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Right Whale 281 Rising Wood
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Risk of Collision 282 Roller Sheave
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Rolling 283 Rope's End
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Ropewalk 284 Round in
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Rounding 285 Royal Marines
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Royal Mast 286 Rudder Iron
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Rudder Pendants 287 Running Agreement
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Running Block 288 Rutter
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Sabik 289 Sailing Boat
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Sailing Directions 290 Sailor's Disgrace
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Sailors' Home 291 Salute
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Salvage 292 Saturated Steam
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Saturation 293 Schedar
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Schermuly Pistol 294 Screw Alley
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Screw Aperture 295 Scupper Lip
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Scupper Nail 296 Sea Cock
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Sea Craft 297 Sea Level
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Sea Lion 298 Sea-Risks
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Sea-Room 299 Seaweed
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Seaworthy 300 Segmental Bar
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Segmental Strip 301 Semi-diurnal Tides
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Semi-menstrual Inequality 302 Set the Watch
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Setting 303 Shaft Tube
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Shaft Tunnel 304 Shaula
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Shear Hook 305 Sheer Off
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Sheer Plan 306 Shelter Deck
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Shelter Deck Type 307 Ship Handling
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Shiplet 308 Shipyard
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Shirt in Rigging 309 Short-Handed
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Short Jaw 310 Shroud Knot
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Shroud-Laid 311 Sidereal Hour Angle
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Sidereal Month 312 Signs of Zodiac
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Sill 313 Sinking a Strand
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Siren 314 Skimming Dish
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Skin 315 Slice
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Slide Valve 316 Slipway
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Slob 317 Smelling the Ground
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Smitting Line 318 Sny
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Soft Iron 319 Solstitial Colure
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Solstitial Points 320 South-East Trade Drifts
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South Equatorial Current 321 Spanking
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Span Shackle 322 Speed Error
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Speed of Wave 323 Spiders Web
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Spike Bowsprit 324 Splice Main Brace
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Splicing Hammer 325 Spring Range
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Spring Stays 326 Square Rig
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Square Sail 327 Standard Nautical Mile
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Standard Port 328 Star Globe
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Star Knot 329 Stay Tackle
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Stay Tube 330 Steerage
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Steerage Passenger 331 Stemson
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Step 332 Sticks
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Stiff 333 Stopping
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Stopping a Flag 334 Straining Screw
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Strand 335 Strike
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Strike Clause 336 Studded Links
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Studdingsail 337 Suction
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Sue 338 Sunday Letter
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Sun Dog 339 Superior Planet
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Superior Transit 340 Swamp
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Swash 341 Swinging Boom
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Swinging Ship 342 Synoptic Chart
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Syphering 343 Syzygy Tide
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Tab 344 Tack Tricing Line
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Taffrail 345 Tangent Sailing
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Tank 346 Taut
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Taut Bowline 347 Telescopic Funnel
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Telescopic Topmast 348 Tephigram
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Terce 349 Thermal Efficiency
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Thermogram 350 Thrapping
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Thrashing 351 Through Fastenings
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Thrum 352 Tidal Current
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Tidal Friction 353 Tide Rode
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Tidesman 354 Timber Hitch
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Timber Load Line 355 Toggle
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Toleration 356 Topgallant Mast
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Topgallant Yard 357 Topsail Halliard Bend
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Topsail Schooner 358 Torricelli's Theorem
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Torrid Zone 359 Track
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Trackage 360 Transit
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Transom 361 Traverse Table
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Traverse Wind 362 Tricing Line
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Trick 363 Tripping Line
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Tripping Palm 364 Trot
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Trough 365 Trysail Mast
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Tsunami 366 Turbulence
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Turk's Head 367 Twiddling Line
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Twig 368 Tyzack Rail Bar
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Ullage 369 Under the Lee
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Undertow 370 Unrig
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Unseaworthy 371 Uvroe, Uvrou
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Vailing Topsail 372 Velocity of Light
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Velocity of Sound 373 Vessel
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Vice-Admiral 374 Voluntary Stranding
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Votive Ship 375 Vulgar Establishment of Port
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Waft 376 Wane
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Waning 377 Warranty
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Warranty of Seaworthiness 378 Water Ballast
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Waterborne 379 Wave Guide
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Wave Length 380 Weather Gleam
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Weather Helm 381 Welding
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Welin Davits 382 Wet Spell
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Wetted Surface 383 Whelps
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Where Away? 384 White Horses
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White Rope 385 Wind Force
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Wind Gall 386 Winger
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Wing Boards 387 Woolder
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Work 388 Wythe
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Xebec 389 Xiphias
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Yacht 390 Yaw
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Yawl 391 Yourkevitch Form
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Zaurac 392 Zone
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Zone of Silence 393 Zygaena
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SHIPPING AND BUSINESS ABBREVIATIONS
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