James Crease (1928-), oceanographer, studied at Dartmouth Naval College and served in the Royal Navy before reading mathematics at the University of Cambridge. Vacation work with Group W (waves) at the Admiralty Research Laboratories led to a permanent position where he rapidly moved his focus from theoretical problems to observational work in oceanography. During the 1950s and 1960s he regularlyparticipated in oceanographic cruises that investigated ocean currents and waves and promoted the use of computers in oceanography for data processing and model building. He remained with Group W and its successors, the National Institute of Oceanography and the Institute of Oceanographic Sciences until 1986, although his work meant frequent international travel and collaboration with a global network of researchers. He retired from the IOS in 1986 and worked for the World Ocean Circulation Experiment based at the University of Delaware until full retirement in 2004.