| 1. N |  | 76. natural wastage |
| 2. N.A. | | 77. nature of sea bottom |
| 3. n.a.a. | | 78. nausea |
| 4. N.C. | | 79. naut |
| 5. N.C.B. | | 80. nautical |
| 6. n.e. | | 81. nautical almanac |
| 7. N.E. Atlantic Fisheries Convention | | 82. nautical assessor |
| 8. n.m. | | 83. nautical astronomy |
| 9. n.o.e. | | 84. nautical chart |
| 10. N.O.I.B.N. | | 85. nautical day |
| 11. n.o.s. | | 86. nautical distance |
| 12. N.R. | | 87. nautical establishment |
| 13. n.t. | | 88. nautical hydrography |
| 14. n.w.t. | | 89. nautical Instruments |
| 15. n/n nn(o) | | 90. nautical mile |
| 16. naabsa | | 91. nautical school |
| 17. NABW - North Atlantic Bottom Water | | 92. nautical signal |
| 18. NACW | | 93. nautical surveyor |
| 19. nadir | | 94. nautical tables |
| 20. NADW - North Atlantic Deep Water | | 95. nautical twilight |
| 21. nail | | 96. nautofon |
| 22. nail claw | | 97. nautophone |
| 23. nail punch | | 98. navaga |
| 24. nail set | | 99. navaid |
| 25. nail sickness | | 100. naval |
| 26. naked | | 101. naval air arm |
| 27. naked diving | | 102. naval architect |
| 28. name board | | 103. naval architecture |
| 29. name plate | | 104. Naval Attache |
| 30. named policy | | 105. naval aviation |
| 31. naming a ship | | 106. naval base |
| 32. nancy dawson | | 107. naval engagement |
| 33. nanoplankton | | 108. naval engineering |
| 34. Nansen bottle | | 109. naval equipment |
| 35. naphtha | | 110. naval harbour |
| 36. naphthenes | | 111. naval hoods |
| 37. naphthenic | | 112. naval infantry |
| 38. naphthenic naphtha | | 113. naval officer |
| 39. narrow band system | | 114. naval shipyard |
| 40. narrow channel rule | | 115. naval station |
| 41. narrow pennant | | 116. naval stations |
| 42. narrow seas | | 117. naval strengths |
| 43. narrow waters | | 118. naval submarine base |
| 44. narrowing | | 119. naval tactical data |
| 45. narrows | | 120. naval telescope |
| 46. narwhale | | 121. navareas |
| 47. nassau grouper | | 122. nave line |
| 48. National authorities | | 123. navel pipe |
| 49. national authority | | 124. navicert |
| 50. national class boat | | 125. navigability |
| 51. national clause | | 126. navigable |
| 52. national flag | | 127. navigable semicircle |
| 53. national letter | | 128. navigable waters |
| 54. National Shippers' Councils of Europe | | 129. navigate |
| 55. nationality of a vessel | | 130. navigating bridge |
| 56. natural (undamped) frequency | | 131. navigating officer |
| 57. Natural commutation | | 132. navigation |
| 58. natural damped frequency | | 133. navigation bounty |
| 59. natural diving | | 134. navigation certificate |
| 60. natural draught | | 135. navigation deck |
| 61. natural fibre | | 136. navigation laws |
| 62. natural fibre rope | | 137. navigation lights |
| 63. natural gasoline | | 138. navigation lights board |
| 64. natural harbour | | 139. navigation lines |
| 65. natural heaving period | | 140. navigation spaces |
| 66. natural magnet | | 141. navigation subsidy |
| 67. natural motions | | 142. navigation table |
| 68. natural pitching frequency | | 143. navigation works |
| 69. natural pitching period | | 144. navigational aids |
| 70. natural projection | | 145. navigational instruments |
| 71. natural resources | | 146. navigational radar equipment |
| 72. natural scale | | 147. navigational satellite |
| 73. natural seasoning | | 148. navigator |
| 74. natural sheer | | 149. navsat |
| 75. natural ventilation | | 150. navtex |
