redirected through either or both deployed clamshell door s 32 or 34 to provide increased turning ability to the air boat referring to fig6 u2013 8 an alternative embodiment of the air boat sound suppressor and directional control system as set forth in fig1 is illustrated in this embodiment the clamshell doors 48 and 50 are constructed and arranged extend rearward of the aft fairing while pivoted to a deployed position in this manner the clamshell doors catch and deflect the jet of air traveling through exhaust aperture 20 without blocking exhaust aperture 20 with the steering vanes 28 for example the clamshell doors 48 u2013 50 are illustrated in their respective stowed positions in fig6 and 7 and their respective deployed positions in fig8 referring to fig9 an alternative embodiment of the air boat sound suppressor and directional control system as set forth in fig1 is illustrated in this embodiment the air opening 41 includes a baffle 60 for directing air into said air opening the baffle has a substantially conjugate shaped perimeter 62 and a smaller diameter with respect to the air inlet 41 the baffle 60 includes a forward portion 64 extending in outwardly in front of said air inlet and a rearward portion extending into said air inlet the construction and arrangement of the baffle directs air between the.