[LasVegasMac]

For us USAF, Navy challenged types - what is "angles and dangles" - ?

LVM

[Poohbah]

When a submarine leaves port and dives, one of the things they do early on is put on fairly steep up and down angles--i.e., perform an "angles and dangles" check.

The idea is to make sure that all gear is properly stowed so that you don't have, for instance, a bunch of canned goods in the galley suddenly break loose and make an enormous racket while you're trying to get away from another ship.

[Az Joe]

"Angles and dangles" is a submariner's term for surfacing and submerging repeatedly or it can be used for substantial changes of depth underwater. Used to train the crew.

The down and up angle of the sub as it does this accounts for the term. The "dangle: part is thrown in because submariners are the greatest miltiary men in the world, kind of like supermen.