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| 51. | shipping kilometre |
| 航行里程 |
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| 52. | interplanetary and interstellar navigation |
| 星际航行 |
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| 53. | flight schedule |
| 航行时刻表 |
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| 54. | island reef navigation |
| 岛礁航行 |
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| 55. | surface navigation |
| 水面航行 |
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| 56. | navigational ranging |
| 航行测距 |
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| 57. | navigation monitor |
| 航行监测仪 |
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| 58. | in-motion waterline |
| 航行水线 |
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| 59. | navigational clearance |
| 航行限界 |
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| 60. | commercial navigatio |
| 商业航行 |
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