Day the Next. p. 317 ff; the Deep Read, AtD(11) June

[mikebailey at speakeasy.net]

Tore Rye Andersen wondered:
> as they single up all lines, as they secure from Sea-Detail, as they come to rest, none." (M&D, 258)
> Curious thing, though: Haven't we generally agreed that "to single up all >lines" means "preparing for departure"? In the M&D-quote, Pynchon seems to >use the phrase in connection with arriving. Anyone?
 
"secure from Sea-Detail" is a boilerplate naval phrase, 
I didn't find a lot of occurrences, but the exact phrase
appears in a naval manual
http://heron.nrl.navy.mil/contracts/closed/fy07/07cr01/07cr01sop.pdf

no details on what the detail entails, though...

I wonder if in a wind-powered ship there might be several contexts
in which you would single up lines?