At Academy, call ATC on 118.1, the eastern frequency. From here, you may be instructed to join final or oblique base for RWY 17L or 13L or via Sandown to join the circuit for a right downwind join for RWY 35R, or a base for RWY 31R. ATC may also instruct you to maintain 1,500 ft for an upwind join.
With a RWY 17 approach, helicopters may often be asked to report at a position 3 nm north of the runways, where they may be asked to change to the western frequency 123.0 and proceed directly to the HLS, thus keeping away from the circuit area of fixed-wing traffic. This is a preferred procedure by the tower.