Two projects in EDU, development of a freeze-proof regulator and decompression tables for the Canadian Underwater Mine-countermeasures Apparatus (CUMA), continue to occupy the majority of the unit's time. Regulator development involved iterative testing and modification of two prototypes while two, four-week dive series were completed to add 173 more human exposures to the data base required to validate the CUMA decompression model and tables. The development of an integrated system of equipment for mine-countermeasures diving integrated well with the CUMA decompression table validation. During each dive series components, such as new weight harness prototypes or dry suit samples, were included in the dives so that development could ontinue in parallel with the table validation. Another project which dovetailed well with the CUMA decompression work was the development of the hand heating system under the Clearance Diver's Supplementary Heat project. Prototypes were evaluated during the CUMA decompression dives. This project has expanded to include whole body heating and electric suits for this purpose were obtained to compare their performance against the standard hot water suit.