This Aquatica Hot Shoe Assembly (Replacement) can be used on the D90 and other recent Aquatica housings for Nikon cameras. This part plugs into a Nikon camera's hot shoe. It is connected to the housings bulkhead (#18916) through the switchboard circuit (#18915). When the camera's shutter opens, the flash connected to the bulkhead with a sync cord, will fire.
Hot Shoe Assembly, Type N for Aquatica Housings (Replacement)