Presolicitation notice from the Department of Defense, Department of the Navy, for the procurement of a balloon underwater. This item is typically used for marine lifesaving and diving equipment. The notice specifies that 23 units are required and delivery is FOB origin. The part must be acquired from/repaired by a specified source, as suitable technical data or manufacturing/repair knowledge is not available from other sources. The proposed contract action is intended for a single source under FAR 6.302-1, but all responsible sources may express interest or submit proposals. The notice also mentions the inclusion of certain clauses related to Free Trade Agreements in the solicitation.