Abstract: A fire fighting tool is described which is capable of both penetrating the wall of an enclosure, and dispensing a fire fighting agent into the interior of the enclosure. A drill bit or other penetrating device is carried at the forward end of an elongate shaft which is connected at its rear end to a drill motor or other appropriate actuating device. The shaft is surrounded by a barrel which receives a fluid fire fighting agent and includes a series of outlet openings at its forward end through which the agent is dispensed. The shaft is thus surrounded and cooled by the agent during the penetration operation. A leaky bearing is provided at the forward end of the barrel, and is specially configured along with the shaft and drill bit to induce a leakage of agent through the bearing and onto the bit and surrounding enclosure wall during drilling, thereby cooling the various parts and lessening the risk of an explosion. The barrel is designed to hold the tool in place once it has been inserted into the enclosure.

Abstract: An improved system for operating a lifting cable over the side of a ship at ea in which a spar buoy having an adjustable lifting capacity is coupled to the ship by a rigid linkage which is free to pivot on an axis attached to the ship deck, and operates to decouple the motion of the ship from the lifting cable. The spar buoy is attached to a gimbal sheave assembly having a disengageable connector and tension line for drawing the connector into engagement with a mating socket at the outward end of a linkage boom. A narrow upper section of the spar buoy is provided with a plurality of vertical tubes and valves which by flooding or evacuating operate to vary the effective water plane area of the buoy for continual fine tuning and optimally adjusting of its natural heave mode characteristic frequency.