From: Brian Walton
Date: 2018 Dec 18, 04:45 -0800
You seem to infer on Dec 16 that the use of the expression “longitude by chronometer” tailed off after the 19th century, and is somehow wrong. Attached is a page from my 1956 Nories, and a page from my 1985 Reed’s Nautical Almanac, this latter page title reproduced exactly in the dozen or so annual Reed’s almanacs I have to hand, going up to at least 1992. The methodology is evident in these attachments.
Longitude by chronometer was current in British yachtsmen’s terminology well up until GPS was common. Your preferred term, “time sight” is very broad brush. Apart from latitude by meridian passage, are not most sights “timed?”