This is a "no-shitter" - this is EXACTLY how it came to be:

One day at sea I was heading aft from the Yeoman shack to reload with coffee or see Prok or Shaky or whatever (maybe just to get away from the XO - the Squirrel) - as I passed by the Radio shack I glanced in and there was a RM3(SS) by the name of Brown, just a little bit of a jitterbug, a black guy standing there with his back to me - beyond him with his back to me also was the Comm Boss an Ensign Wehner and a little further in (hell you can't go much farther in) was the lead RM by the name of Floyd Evans who was an RM1(SS) at that time (later made Chief, LDO - LCDR Gold Dolphins).  Anyway, Mr. Wehner was relaying some important information to Evans (EVERYTHING that Mr. Wehner relayed was important, so he thought!) and everytime that he would commence to tell Evans something, Brown who was behind Mr. Wehner would raise his two hands like he was holding one of those large tubes of lunchmeat commonly referred to as "horsecock" among other endearments - and open his mouth forming a big round "O" - you know what I mean - the "fags" favorite posture......Evans couldn't help but see Brown and would smile or laugh and look down again and Mr. Wehner would say..."....Evans - look at me when I'm talking to you!...." and Mr. Wehner had no idea what was going on behind his back.   This was STILL going on as a left the area.  I couldn't help to pass the word as to what I just saw.  You KNOW that you can't keep something like a secret on a submarine and presently everyone aboard was rendering what is known as the "Segundo Salute".

Around that same time frame we had been chosen to represent COMSUBPAC in Australia for the Celebration of the Battle of the Coral Sea.  As we steamed into either Newcastle or Brisbane we had a rather large crowd of civilians who met us and watched us tie up and take on stores, etc....Liberty call and the troops went ashore and met some lovelies and were seen giving each other
the "Segundo Salute".  Of course they wanted to know what that was - what were they doing?  Someone, I don't know who, told them that it was a submarine sailor's way of saying "hello" or "hi" - how you doin' and never gave it another thought.  We left that port and pulled into either Newcastle or Brisbane and as we got closer to the pier - lo and behold some of the lovelies had traveled from the previous port and met the submarine!  Another rather large crowd was there but only this time the lovelies had told quite a few people what they were doing - giving the "Segundo Salute" to the guys that they knew topside and pretty soon a large majority of the crew - including kids and grandparents were proudly rendering the "Salute".....I wonder if they still remember it down there?  This is the truth as I know it
- Hotch