Hi everybody! I thought I'd share something to see if others here can help me improve my understanding of how the term "deck watch" is commonly used. My confusion is the following. I feel like I have a decent grasp of the difference between the mechanism of different types of precision timepiece: Lever vs. detent escapement Free-sprung vs regulator Going barrel vs. fusee Helical vs. overcoil spiral hairsrpings Mounted on gimbals or not etc. I also think I have a decent grasp of the main functions that various timepieces were put to: Master clock on a ship Auxiliary watch for use away from the master clock So the term "deck watch" (and others like "assistant watch," "comparing watch," compteur, etc.) seems to refer to the last bullet point. But if I understand things correctly, many of watches that are conventionally referred to as "deck watches" were often used as master clocks on smaller ships or shorter voyages, right? For example, reading between the lines in Whitney's books (I don't find it 100% clear), I understand that the unmounted Hamilton model 22, which I've seen often named a "deck watch," was used both as master clock on some ships and as an auxiliary "deck" watch on others. Whereas the Hamilton 2974 comparing watch was used exclusively in the "deck" role. Is this accurate? Thanks!