Underwater Power/Data Interface Module - accessory for SBE 19/19plus/19plusV2/25/25plus CTDs. Converts surface power for use by CTD and provides two-way communication interface between CTD and Deck Unit via single-conductor armored cables up to 10,000 meters long. Includes Seasoft software and complete documentation. Requires use of SBE 33 or SBE 36 Deck Unit - ordered separately. Does not include interface cables or mounting hardware – ordered separately.