GPSMAP® 79s - Marine handheld GPS with worldwide mapping

The Garmin GPSMAP 79s is a marine handheld device designed for reliable and autonomous navigation, offering a versatile solution for sailors. Unlike fixed chartplotters such as larger GPSMAP series models or MFDs (Multi-Function Displays) from competing brands like B&G or Raymarine, the GPSMAP 79s stands out for its portability and independent power supply. It integrates worldwide mapping, making it an essential tool for planning and executing routes, whether as the primary navigation system for tenders and small boats or as a critical backup device aboard larger vessels.

Features and positioning

This handheld GPS runs on replaceable alkaline or NiMH batteries, providing extended flexibility away from the vessel’s power sources. This feature positions it as a strategic complement to integrated navigation systems, ensuring service continuity even in the event of electrical failure. While models like the Garmin GPSMAP 86s may offer more advanced connectivity and features, the 79s focuses on the essentials: precise and accessible navigation. It serves as a navigation aid, reminding users to always cross-check displayed information with other official visual and cartographic sources, in line with maritime best practices.

Technical and usage considerations

The design of the GPSMAP 79s accounts for the marine environment, though it is important to note warnings about prolonged immersion in water. It is built to withstand typical marine conditions (splashes, humidity), but care must be taken to avoid full submersion, as specified in the safety documentation. Its GNSS (Global Navigation Satellite System) receiver, including GPS, ensures accurate positioning, though performance may degrade near terrestrial broadband networks operating close to GNSS frequencies. This technical positioning makes it particularly suitable for navigators seeking a simple, robust, and autonomous solution without the complexities of a full NMEA 2000 system integration.