This is where the analog watch comes in. If the bos’n tells the mate that it’s almost coffee and the mate a has gold Marinara Trench Odyssey 2001 UTC Atomic Automatic, 4 mhz, digital watch the mate is going to check his watch and see that its exactly 09:47:42, which, in digital terms, very clearly is NOT coffee. Might get ugly.
On the other hand if the mate is using a no name analog watch he got on sale at Walmart for eight bucks and can’t recall the last time he checked it against the GPS, than there’s parallax to consider, etc. In that case the mate can say something along the lines of, OK, fine bos’n, but we got work to do, after coffee we can’t be dicking the dog.