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1·A nautical almanac gives information about the sun, moon, tides, etc.

航海年历中有日、月、潮汐等的资料。

2·The precision analysis indicates that its precision is much higher than that of Nautical Almanac.

分析表明，精度优于《航海天文历》。

3·It is complex to get the two factors in altitude difference method by consulting the nautical almanac.

利用《航海天文历》查表的方法求取高度差法两要素，过程比较复杂。

4·It is intended to offer the skipper of the fishing boat to use the TI-59 Calculator to fix by the sun instead of the Nautical Almanac.

提供渔船船长在不查《航海天文年历》的情况下，即可利用T 1—59计算机进行太阳定位计算。