Wow, Jeff, small world! I was a corpsman also! Started with the Marines, then went on to the fleet: submarine, cruiser, destroyer, and finally a rickety old minesweeper. The MSO was 185 feet long with a shallow draft and round bottom, so I can relate to your service aboard Sweetgum!
By the way, that ship was so unreliable, and operated close offshore, that many times the Coasties out of Coos Bay OR and Port Washington WA either towed us out of harms way or made emergency runs to Radio Shack for the critical vacuum tubes that we still used...and this was the mid-80s! We used to catch fire with annoying regularity.
Between being shot at with the Marines, and losing so many meals on that tub, I decided to seek a saner way of life and got out! /forums/images/graemlins/smirk.gif
Pete