TM 5-1940-321-13&P
OPERATION
Section I. INTRODUCTION
4-1. GENERAL. This chapter provides detailed procedures for operating the F530 IAB. A thorough
understanding of the procedures in this chapter is necessary to ensure safe and reliable operation. This chapter
discusses factors that affect F530 IAB performance. It contains the procedures to prepare a F530 IAB for
operation and describes procedures for different operating conditions.
4-2. MODES OF OPERATION. There are two basic modes of operation for the F530 IAB: paddled and outboard
motor powered.
a. Paddle Operation. The F530 IAB can be paddled using some or all nine paddles provided. When
not in use, the nine paddles are stowed as shown in chapter 3. Figure 3-9. When paddling is planned, an
additional coxswain paddle may be carried.
b. Powered Operation. An outboard engine is mounted on the transom for powered operation.
Powered operation is used when the mission requires greater speeds, distances, and heavier payloads.
4-3. FACTORS AFFECTING OPERATIONS. The speed, handling, sea-state, operating range, and size of
payload are influenced by several factors. Safe and efficient operation requires an understanding of these factors
and the effects they have on craft performance. The factors affecting F530 IAB operation are loading, tilt & trim,
payload, balance, outboard engine installation, sea conditions and weather, type of flooring system, and most
importantly the boat s inflation pressure.
a. Loading. The payload is the combined weight of the crew, fuel, equipment and cargo. As payload is
increased, the craft sits lower in the water. This increases the wetted area of the craft. With more of the craft
underwater, drag increases. This results in lower boat speed at a given engine throttle setting in comparison to a
more lightly loaded craft.
( 1 ) The maximum payload of the F530 IAB (3770 pounds) is greater than the planning
payload. If loaded too heavily, the craft will not place. A lightly loaded craft will have
higher speed and lower fuel consumption. As payload is increased by adding crew,
fuel, and mission equipment, it is necessary to operate the outboard engine at a higher
rpm s to maintain the same boat speed. This results in greater fuel consumption.