It was horrifying to see in 'Survivorman' that the survival kit in his inflatable dinghy was an unsealed plastic bag with a flare that started getting hot immediately and items missing. Trouble is unless you put it together yourself how do you know a sealed (or sealed in your dinghy, BOB kit is ok?
Maybe I answered my own question with 'unless you put it together yourself'. If you can repack a dinghy.
The Sock