Generic user guides for all forms of on-board communications, both ship to ship and ship to shore. Systems covered include: GMDSS (Global Maritime Distress Safety System) communications; EPIRBs (Emergency Position Indicating Radiobeacons), PLBs (Personal Locator Beacons), SARTs (Search and Rescue Transponders), RTEs (Radar Target Enhancers); NAVTEX (software to receive weather reports and navigational warnings on HF radio); VHF (Very High Frequency) radios; SSB (Single Side Band) radios, HF (High Frequency) radios; Amateur (Ham) radio; Short Wave radio; email services and internet; satellite communications; weatherfax and more.