AIS (automatic identification system) is a standard of information sharing that has existed in the commercial shipping world and is now becoming affordable for pleasure vessels. AIS information is received on your chartplotter or GPS and shows other vessels transmitting an AIS signal. The information available includes vessel heading and speed, along with other information. AIS is not standard on every model but is a worthwhile option. AIS transmitters are available as well for sharing your vessel’s information to those around you while underway. AIS helps to avoid collisions at sea by making operations more knowledgable about the vessel movement around them.