Transportation Corps Warrant Officers operating as Marine Deck Officers command Army Watercraft System (AWS) vessels (Class A1 and A2) operating on lakes, bays, rivers, sounds, coastal waters, and open ocean waters.  Responsible for proper maintenance and operation of AWS vessels and vessel systems, to include (but not limited to): weather and oceanographic analysis and planning, navigation, route planning, communications, safety, pollution prevent and abatement, risk assessment, amphibious operations, Joint Maritime operations, crew leadership, training, vessel readiness, force protection & weapon systems, medical preparedness & vessel sanitation, helicopter & airborne operations, seaworthiness, firefighting, and ships business.  880As navigate vessels using all available means, to include nautical charts, ECDIS, area plotting sheets, compass, sextant, terrestrial bearings, depth soundings, radar ranges and bearings, and electronic navigational aids. Transportation Corps Marine Deck Officers are the arm to ensuring Army Watercraft deploy and provide support in any theater of operations.