Outboard Motors Components

Inflatable Rescue Boats (IRBs) have been used for all forms of surf rescue, retrieval, and service by Surf Lifesaving in New Zealand and Australia since the late 80s. more...

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Overview

IRBs are made of rubber and consist of 4 inflatable tubes - 2 side tubes, a bow tube and a keelson tube. This specific feature coupled with the obvious fact that they are used in the water, has coined the term "rubber duck" or simply "duck" to describe an IRB. Typically the rubber is coloured a shade of red termed "Rescue Red" although a particular make of craft manufactured by 'Arancia' come in a shade of orange. They have a rigid floor piece and a rigid transom for fitting an outboard motor (usually 25 hp). This motor is capable of providing a maximum drive speed of between 25-30 knots on flat water. 2-Stroke fuel is stored in a flexible fuel bladder and is secured by 4 clips to the floor in the bow. An IRB is crewed by two people - an IRB Operator/Driver and an IRB Crewman. The Operator sits on the lower half of the port side pontoon where he operates the outboard motor to control the boat. He has foot straps to help him stay in the boat. His left hand can hold on to a strap on the port side pontoon and his right hand operates the outboard motor by means of a tiller arm and throttle. The Crewman sits on the upper half of the starboard side pontoon. A handle is attached by a rope to the nose of the boat for him to hold with his left hand, while his right hand may hold a strap attached to the starboard pontoon. He balances the boat and allows it to go over large waves before they break without flipping. He also assists when going through a breaking wave, commonly referred to as "punching-through". Two foot straps are available for his feet.

Brief History

In 1969, after returning from life guard duties in the UK, Warren Mitchell of the Avalon Surf Lifesaving Club, had the idea for a rescue craft that could be deployed quickly under varying surf conditions and was adaptable to different Australian beaches. The first IRB he developed was in conjunction with the Dunlop Company and utilised a 20hp outboard motor. It measured 4 metres in length and set the precedence for the familiar IRB we now use today. Avalon SLSC, New South Wales is now considered the home of the IRB.

Patrolling

IRBs are of great value when patrolling a beach especially ocean surf beaches where either the surf is too powerful or the beach too large to perform rescues effectively on a board.

Prior to the start of a patrol, it is the driver's responsibility to ensure the craft is correctly set up and ready for patrolling duties. Typically this will involve inflating the crafts 4 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, 2 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. This is usually a location outside of the safe swimming area defined by the patrol flags. Where applicable the boat maybe towed onto the beach by way of a tractor or small jeep and trailer.

Read more at Wikipedia.org