(_b_) _Removal of small sunken craft and debris._ Small boats usually are sunk alongside wharves and quays to prevent ships from approaching close enough to unload. Also, cranes and sections of the wharves blown into the water have to be removed. Divers examine the debris and determine whether it can be pulled out of the way into deeper water or if it first must be broken up. Since the use of large quantities of explosives may further damage adjacent quays and piers, debris too heavy and bulky to hoist and drag is cut into smaller sections by underwater cutting. Then these sections are raised by the cathead and pulled out of the way by the ship. Small, sunken craft often can be salvaged by sealing up the hulls and pumping out the water with salvage pumps. This type of salvage work can be done from the 50-ton barge which leaves the repair ship free for other jobs. (_c_) _Furnishing materials, power, and equipment._ _1. Materials._ Materials required by the port group to start its work can be furnished in limited quantities by the repair ship. However until cargo ships can unload at the port, the group must get locally the bulk of the materials it needs. The small amount of cement, timbers, and structural steel that the ship carries can be put ashore on the ship’s barge. _2. Power._ Until local sources of power are restored or floating power plants are available, power for lighting and for operating equipment is supplied by the ship’s stationary and portable generators and compressors. _3. Equipment._ Such portable equipment as the clamshell bucket, welding and cutting outfits, trailer-mounted fire pumper, and pneumatic tools, is turned over to the group as it is needed. If necessary, equipment operators are furnished from the ship’s personnel. (_d_) _Use of the ship’s shops._ The ship’s shops are used to make parts for and to repair port machinery and equipment. Typical jobs are to repair engines and motors and to construct or repair cargo-handling equipment. (_e_) _Underwater construction and repairs._ The ship’s divers may be required to repair the underwater structures of damaged piers and quays. Broken or weakened pilings or timbers may have to be cut and removed so new ones can be placed. Also, the foundations of harbor breakwaters or sea walls may require strengthening or repairs. =c. Safety of ship.= While operating in the close waters of the harbor, especially while threatened with the additional hazards of debris, mines, underwater obstacles, and enemy air attack, the safety of the ship is of paramount importance. The master of the ship is responsible for her safety. He sees that the gun crews are at their stations and that enough deckhands are available for the extra work required in mooring and maneuvering.