NMEA-member Shelter Island Marine Electronics in Point Loma equips vessels with Garmin, Raymarine, Furuno, and iCom navigation and communication systems from its waterfront showroom on Shelter Island. The shop stocks hundreds of cables, adapters, and mounting accessories for same-day installation — inventory depth that complements the broader chandlery selection at West Marine on Rosecrans. Bench technicians calibrate and repair older chartplotters and radar units using test equipment connected to on-water simulation scenarios, a capability enabled by the shop's marina-basin location. KVH TracPhone VSAT broadband, Fusion audio, Lumishore underwater LEDs, and Victron power management push the catalog past core navigation into full-vessel electronics integration — a wider scope than the nav-focused inventory at Copper Bay Marine Electronics. Multi-deck yacht rewiring projects integrating autopilot, FLIR thermal cameras, and satellite TV represent the team's most complex installations.