It’s the one at the bottom on the Port (Left) side of HMS Hermes in the Indian Ocean back in 1967. The good ship RFA Retainer (Royal Fleet Auxiliary). The ship on the other side of Hermes is RFA Tidereach.
Retainer was replenishing the Hermes with ammunition, whilst Tidereach was topping her up with fuel. Incidentally Tidereach was my second ship.