the crafts four pontoons to the correct pressure with a hand/foot or electric pump. The motor is test run in a tank of fresh water to check full function and reliability before installation to the transom. The fuel bladder is filled and installed along with a tow rope, rescue tube, two oars, and a blunt point knife as minimum. A check list is then filled in by the driver, after which the IRB may be signed on for patrol by radioing "Surf Command". At this point other patrol members assist to move the craft to a suitable launching position on the beach. The IRB is typically set up in a location outside the safe swimming area defined by the patrol flags. Where applicable, the boat may be towed onto the beach by way of a tractor or small jeep and trailer. When performing a rescue, the driver must negotiate large surf breaks and possibly obstacles such as rocks or other swimmers to reach the patient. The crewperson helps the driver by keeping a lookout for the patient and hazards. They are also instrumental in keeping the IRB balanced when crossing surf breaks and turning rapidly. The crewperson is also primarily responsible for bringing the patient on board, often during extremely dangerous and rapidly changing conditions, and looking after their welfare while at sea. The crew of an IRB can communicate with the shore through various accepted hand signals or through modern waterproof radios which are becoming more popular. During a patrol, an IRB will be left on the beach by the waters edge at all times ready for action. On a busy day an IRB may be permanently out the back checking on swimmers. On conclusion of the patrol, it is imperative the IRB is correctly packed up and stored to ensure it is ready for use by the next patrol, left in a "rescue ready" state. This is also the responsibility of the driver, who will usually start by radioing surf command and signing the IRB off for the day. This may involve reporting any rescues as well as how many people are still on the beach and in the water. Once the IRB has been signed off, the boat is taken up to the club where the motor is removed and run in a tank of fresh water for approximately 10 minutes. This clears the remaining salt water