Unmoderated forum on marine electrical and electronic equipment. Good advice and resources here, but you have to dig and you have to be selective.
A discussion board and photo gallery for cruising sailors and wannabes focused on sailing instruments and communications equipment. Autopilot, radar, sonar, chart plotters, satellite telephones, mobile telephones, internet, marine e-mail, VHF, HF, SSB, etc.
Tips and attitudes that will keep you safe from other boats in the fog.
Brackets for mounting radar antennae on masts, poles or towers.
Oliver has devised forms for his own use, including passage planning and tide prediction forms, and navigation, deck, and radio logs. These can be downloaded from his site in either MS Word or PDF format.