Thanks again David for the info, thats 2 51 year old vessels i have seen in this last week.

Ive just posted an earlier photo of her with a red hull and a clear space between CHAO and TA. Just to add to any confusion she is listed in Lloyds as CHOW THA S.2 ! Its good to see her on the move, as when I saw her, she stayed opposite my hotel for all the time I was there.

In Equasis as CHAO THA S.2 (IMO 7004811) - buoy tender
(Miramar has "research vesel")

251gt 80dwt, 39.4 x 8.0m
built 1969 Hayashikane, Nagasaki (Yd 715)

Thailand Government: Bureau of Water Development and Maintenance