All submarine buffs and any other confirmed claustrophobiacs will please stand by for the longest submerged cruise in history: here is the tale of the USS Triton's undersea circumnavigation of the globe, following the route of Magellan, which took place between February 16 and May 11, 1960. It is told by her own skipper, Captain Beach, who is also the author of a popular account of submarine action during World War II (Submarine!) and a best selling novel on the same subject (Run Silent, Run Deep). For those who have not read either, the captain's style might best be described as readable Navy-ese. This story is recounted with every conceivable detail accorded its place, from the earliest genesis of both captain and ship (the Triton, a 440-foot two-reactor submarine, can hardly be called a boat as other subs are) through a day by day account of the work, recreation, and near calamities of the actual record-making journey. (It was a classified project ordered by the Navy to help to pry funds out of Congress for more Polaris subs.) There is drama and suspense to a degree, but non-members of the seemingly burgeoning sub-club are hereby warned that most of it may prove too deep for them.