What the Heck is "Snorkeling" would someone please tell me!

Rep. Eric Massa stepped down from Congress on Friday but that hasn't stopped new information from coming out about his past behavior. In fact, it seems that his resignation came shortly after the House Ethics Committee were notified of Massa's behavior in the Navy. Massa's behavior in the Navy was not unknown to some in Washington.

An article in The Atlantic details some of this behavior but leaves out one critical piece of information: Would someone please explain to me what "snorkeling" is?

Clarke says that Massa's roommate, Tom Maxfield, was also assaulted. "Tom lived on upper bunk," Clarke say. "When you're on ship, you're almost exhausted 24-7. So a lot of times you sleep with your uniform on. Tom and Massa shared a stateroom together. Massa climbed up on the top of his bunk, which is hard to do--you never crawl up on somebody else's bunk. He wakes up to Massa undoing his pants trying to snorkel him."

Now let's be the first to define (invent) some other obscure and inappropriate naval behavior like:

Brass Monkey

Here's the official definition: A holder or storage rack in which cannon balls were stacked on a ship. Supposedly when the "monkey" with its stack of cannon balls became cold, the contraction of iron cannon balls led to the balls falling through or off the "monkey."

And how about a

Coxswain
Again, official definition here: The swain (boy servant) in charge of the small cock or cockboat that was kept aboard for the ship's captain and which was used to row him to and from the ship.

How we lost the Cure For Scurvy

One of the most striking features of the disease is the disproportion between its severity and the simplicity of the cure. Today we know that scurvy is due solely to a deficiency in vitamin C, a compound essential to metabolism that the human body must obtain from food. Scurvy is rapidly and completely cured by restoring vitamin C into the diet.

Except for the nature of vitamin C, eighteenth century physicians knew this too. But in the second half of the nineteenth century, the cure for scurvy was lost. The story of how this happened is a striking demonstration of the problem of induction, and how progress in one field of study can lead to unintended steps backward in another.

An unfortunate series of accidents conspired with advances in technology to discredit the cure for scurvy. What had been a simple dietary deficiency became a subtle and unpredictable disease that could strike without warning. Over the course of fifty years, scurvy would return to torment not just Polar explorers, but thousands of infants born into wealthy European and American homes. And it would only be through blind luck that the actual cause of scurvy would be rediscovered, and vitamin C finally isolated, in 1932.

http://idlewords.com/2010/03/scott_and_scurvy.htm