It has come to our attention in our end of swing meeting that there are holes in tank tops in the engine room, most notably in one if the fuel oil tanks which has been pumped to other tanks and a fresh water tank. We are told the company (Seabird Exploration) have been made aware of this and they have not made any actions other than to suggest welding a plate over the holes on top of the fuel tank. This cannot be done at sea and is certainly a drydock job. I believe the medic/hse has a copy of an incident report form relating to this which I will attempt to get a copy of and forward in person to the WA branch. We are due in Bali in 2 days for redelivery.