Description Replacement Hydrostatic Release mechanism for Ocean Signal Cat I EPIRBs. Must be replaced every two years from date of installation. ONLY this model will fit Ocean Signal Type I housings. Find the manual online: To find the H20 manual online, visit https://www.cmhammar.com/catalogue/ or scan your H20 with the Hammar MarCode App.. To find approvals https://www.cmhammar.com/approvals/
