NavList:

You can also print your own copy. I will be uploading a cleaned-up PDF of the 1920 edition in about an hour.

Just so there's no misunderstanding, none of these various methods of working the time sight are really doing anything different. Mathematically, there is only one problem and one solution, apart from trig identities. These methods simply organize the work in different ways, some of which are more efficient than others. Martelli's tables date from an interesting period in the history of navigation when the culture of navigation was gradually shifting from the "Old Navigation" (time sights for longitude, meridian altitudes for latitude) to the "New Navigation" (LOPs by intercepts and azimuths). It's interesting that there were still people creating improved methods for the Old Navigation methods even while navigation schools were doing their damnedest to convince navigators to junk all that and embrace the intercept method.

-FER
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