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Vertical clearance ??
BG Phew, that's pushing the envelope of what I'd do for that type of
navigation. otn Jack Dale wrote: On Sat, 09 Aug 2003 22:30:17 GMT, otnmbrd wrote: PS got my hands on a light list .....no tidal info in there for particular lights, that I could see. The height of the light is from MHW on US charts. That is about all the tidal information in that publication. If you use the "dipping the horizon" technique for establishing a circle of position, the height of the tide at the time of the observation must be taken into consideration. Jack |
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