Ghost Ship in TMO
 

Patrolling the Convoy College east of the Batan Islands I encountered what I can only describe as a ghost ship. It appeared as a sonar sound contact, warship, moving fast, closing, and I altered course to engage. When I spotted it it appeared to be a large 18th Century square rigger sailing ship doing about 15 knots. It was a ghostly translucent green and was trailing long, translucent green wisps of ectoplasm. I asked to Weapons Officer to identify it and his answer was "What is that?!?".

Anyone else ever see this?

TMO v2.5
M.E.P. v5 with green water
Bigger Better Protractors

I let it go on it's ghostly way...

This is an easter egg that is in Stock SH4. It is the Flying Dutchman. I've encountered it as well. It only spawns 1 time in 5 months and the chances of it spawning are 20%. Consider yourself very lucky that you saw such a sight.