| No. | Item | Definition |
|---|---|---|
| 1. | abandon ship | order to leave vessel |
| 2. | abeam | at right angles to side |
| 3. | aft | toward the stern |
| 4. | all stop | command to stop engines |
| 5. | amidships | in the middle of ship |
| 6. | anchor | device that holds position |
| 7. | anchorage | place suitable for anchoring |
| 8. | astern | behind the ship |
| 9. | beacon | fixed navigational signal |
| 10. | beam | ship’s width at widest point |
| 11. | bearing | direction relative to north |
| 12. | berth | sleeping place or mooring |
| 13. | bollard | post for securing lines |
| 14. | bow | front of a ship |
| 15. | bridge | command area of a ship |
| 16. | bulkhead | interior vertical partition |
| 17. | buoy | floating marker or aid |
| 18. | channel | safe navigable water route |
| 19. | chart | map for marine navigation |
| 20. | chronometer | precise timepiece for navigation |
| 21. | cleat | fitting for tying lines |
| 22. | companionway | stairway between decks |
| 23. | compass | instrument showing direction |
| 24. | course | intended direction of travel |
| 25. | current | continuous movement of water |
| 26. | dead reckoning | position estimated from course |
| 27. | deck | floor surface on a ship |
| 28. | distress | grave danger requiring help |
| 29. | dock | place for mooring ships |
| 30. | draft | depth below waterline |
| 31. | drill | practice exercise for emergencies |
| 32. | ebb | outgoing tidal flow |
| 33. | engine room | space containing propulsion machinery |
| 34. | ensign | junior commissioned naval officer |
| 35. | fantail | stern overhang or aft deck |
| 36. | fathom | unit of water depth |
| 37. | fender | cushion protecting ship’s side |
| 38. | fix | determined navigational position |
| 39. | flood | incoming tidal flow |
| 40. | fog | thick cloud near surface |
| 41. | forecastle | forward part of upper deck |
| 42. | forward | toward the bow |
| 43. | freeboard | height above waterline |
| 44. | gale | very strong wind |
| 45. | galley | ship’s kitchen |
| 46. | gangway | passage or boarding ramp |
| 47. | grounding | running aground on bottom |
| 48. | gyrocompass | north-seeking compass instrument |
| 49. | harbor | sheltered water for ships |
| 50. | hatch | opening with a cover |
| 51. | hawser | thick rope or cable |
| 52. | heading | direction a vessel points |
| 53. | heave to | slow or stop a vessel |
| 54. | helm | steering position or wheel |
| 55. | hull | main body of a ship |
| 56. | keel | main structural bottom beam |
| 57. | knot | nautical mile per hour |
| 58. | ladder | shipboard stairs or ladder |
| 59. | leeward | downwind side |
| 60. | life jacket | personal flotation device |
| 61. | life raft | inflatable emergency survival craft |
| 62. | lifeboat | boat for emergency escape |
| 63. | lighthouse | tower guiding ships with light |
| 64. | line | rope used aboard ship |
| 65. | lookout | person watching for hazards |
| 66. | make way | move ahead through water |
| 67. | man overboard | person fallen into water |
| 68. | marine | member of naval infantry |
| 69. | mayday | international distress call |
| 70. | mess | eating area or group |
| 71. | mooring | means of securing a vessel |
| 72. | muster | assemble personnel for roll call |
| 73. | nautical mile | distance unit used at sea |
| 74. | port | left side of a ship |
| 75. | propeller | rotating device driving ship |
| 76. | quarterdeck | ceremonial area near stern |
| 77. | radar | radio detection system |
| 78. | roadstead | anchorage outside a harbor |
| 79. | rudder | steering blade at stern |
| 80. | sextant | instrument measuring celestial angles |
| 81. | shoal | shallow water or sandbank |
| 82. | sonar | underwater sound detection system |
| 83. | soundings | water depth measurements |
| 84. | squall | sudden violent windstorm |
| 85. | starboard | right side of a ship |
| 86. | stern | rear of a ship |
| 87. | storm | violent weather at sea |
| 88. | superstructure | structure above main deck |
| 89. | swell | long rolling sea waves |
| 90. | task force | temporary operational naval group |
| 91. | tide | regular rise and fall |
| 92. | torpedo | self-propelled underwater weapon |
| 93. | underway | moving and not anchored |
| 94. | visibility | distance one can see |
| 95. | wake | water disturbed behind vessel |
| 96. | watch | duty period aboard ship |
| 97. | watchstander | person assigned to watch |
| 98. | waterline | line where hull meets water |
| 99. | wharf | platform for loading ships |
| 100. | windward | upwind side |
