Hello Mr. Tore,
I have been reviewing pages 61 through page 63... See the attachment.
The lines above and external are used to test for when the RFO saddle tanks and internal tanks are full...
The hull section on the right shows the sampling of the internal bunker/tank 2 going to a bucket to measure the remaining fuel oil. What I believe they are doing with the 3 other lines is testing for water when the tanks are empty; FBT 4 port and Stb and IB 2 (1 bucket with 4 lines).
The hull center section in the center shows the same setup for the internal fuel oil bunker/tank 1 for measuring the contents. They have another line going to a single bucket where they are testing for water when the IB 1 tank is empty (1 bucket 2 lines).
The hull center section - the lines at the top of R 1 port and stb go to a bucket, but I'm not sure why... They could open the lines going to the bucket to allow R 1 to vent while refueling, and monitor the long glass sight tube to know when to stop the pumping.
a) What is this bucket for and where is it located?
b) If the valves were shut going to the bucket, and the depot pumping continued for a few seconds. What kind of problem could result?
The meaning of Transfer, Delivery, and Venting...
c) The line in R 1 is pressurized when transferring fuel oil to another tank
d) The line in R 1 is pressurized when delivering fuel oil to the gravity/day tank to fuel the diesel engines.
e) The line in R 1 is venting when the tank is being refueled by a pumping station.
Are these the correct definitions for Transfer, Delivery, and Venting in this instance?
The hull section on left looks OK... They can test the FRO 2 saddle tanks for water at the top when the tanks are empty.
One additional question... Were the collection funnels for fuel oil over-flow physically below the deck, or was there only the vent lines with shut-off valves? So the fuel oil depot station personnel carried the funnels on-board to drain the fuel oil over-board?
I really apologize for changing this post so many times - I'm finding out things as I go...
Regards,
Don_