I am a USCG veteran (MK) and used my sea time to get my six pack year ago. I believe the DD214 will show your sea time.
You should consider contacting Maritime Professional Training (
www.mptusa.com) and get your RYA/MCA (British) Yachtmaster license if the "white fleet" is your bag, baby. This license will take you places that a USCG license will not and gets you 200 tons instead of 100 tons. You also only need 90 days to qualify.
Did you actually spend 4 years on Javis? I was on Mellon when she was homeported at Sand Island, but that was in the early 70s. Then rotations were 2 years.