THE US Coast Guard yesterday announced that Bombardier Inc and Mastercraft Boat Co are conducting voluntary boating safety recall campaigns. The Coast Guard said the Bombardier recall involves starter and battery cables that may become exposed. The exposed cables could make contact with metal and possibly cause sparking or an explosion. The Mastercraft recall involves a possible damaged gasket seal which may result in a fuel leak which could cause a fire or explosion. Persons who own any of the models identified in the recall campaigns, and who have not received a recall notification, should contact the manufacturer to have the problem corrected. The law requires that manufacturers correct safety defects at no cost to the customer. Manufacturers are required, when a defect is found, to mail a recall notice to all purchasers or owners. Sometimes, however, they are unable to maintain a complete mailing list of all owners.