Military Dive Rebreathers MR5500 - Semi-Closed Mine Countermeasures (MCM) Diving Apparatus HomeSafety and SurvivalMilitary Dive RebreathersMR5500 - Semi-Closed Mine Countermeasures (MCM) Diving Apparatus The MR5500 VIPER SC is a rugged, low profile, self contained back mounted rebreathing apparatus developed specifically for MCM from Very Shallow Water operations to depths of 55 msw. Home Capabilities Customers Suppliers Careers News About Military Dive Rebreathers Product Contacts USA Cobham Mission Systems, Davenport, USA 2734 Hickory Grove Road, Davenport, Iowa, USA 52804. Tel +1 563 383 6000 Fax +1 563 383 6430 Cobham Mission Systems Davenport LSS Inc. View location Contact office