TM 5-1940-321-13&P
FUNCTIONAL DESCRIPTION
GENERAL. For reliable and safe operation, personnel operating and maintaining the F530 IAB
must be familiar with the F530 IAB components and understand their functions. This chapter provides a
technical description of each component and describes its function. The chapter also provides a
functional description of several related F530 IAB items that are commonly used but must be ordered
separately.
3-2. MAJOR COMPONENTS. This section provides a functional description of the major components
of the standard IAB. Major F530 IAB components are listed below. Refer to figure 3-1 for their location in
the craft. Items that are part of these major components are discussed as part of the major component.
A.
Main Buoyancy Tube
B.
Transom
C.
Inflatable Keel
D.
Rigid Floor Assembly
E.
Thrustboard
F.
Lower Buoyancy Tubes
Figure 3-1. Location of Major Components of the F530 IAB.
3-3. MAIN BUOYANCY TUBES. The main buoyancy tubes are constructed in a U-shape as viewed
from above the craft, and as shown in figure 3-2. The material is a black, heavy-duty polyamide fabric.
The fabric is protected by a coating that consists of neoprene on the interior surface and
hypalon/neoprene compound on the exterior surface. This system provides air tight
