Sentence:  Weapon barrels pointed <WSD>deck-wise</WSD> between clenched knees, eighteen or so of us sat across from one another on one of many twinpropped whirlybirds, flying fore and aft, right and left of us in tight flight formation, the cool wind whipping through the four portholed windows about our whowhopwhop! sounding bird like April winds back home, the gook sky clear as a polished robin's egg, but for a few sparse clouds floating about. 
Meaning of the word marked with <WSD> tags:  Along or toward a deck