Hi, I sailed on the Umgeni when she became the Winnibar of ED line fame [every day labour] and I can vouch for the enormous size of the Halls compressors and the heat on the middles when off the African coast, they were beasts indeed. One of the perks was dipping the Palm Oil Tanks, as you so rightly say. Regards Orcades(Pint)Re refrig cargo. My first trip in MN was 8th eng. on Bullard King Umgeni. She had one of these enormous Hall steam recip.compressors, and it was the duty of the junior to go around and take readings on the night watch. This entailed unscrewing deck plugs and lowering a thermometer down into the chamber. As these were mostly in the passenger accom. alleyways the chore was eagerly sought by all, leading to many nocturnal trysts which were otherwise unobtainable!