GARMIN GPSMAP 531s without transducer

Contents of the Package

Features

Specifications

Physical & Performance:
Unit dimensions, WxHxD:  5.9" x 6.4" x 2.9" (15.0 x 16.3 x 7.4 cm) 
Display size, WxH:  3.0" x 4.0", 5.0" diagonal (7.6 x 10.2 cm, 12.7 cm diagonal) 
Display resolution, WxH:  234 x 320 pixels 
Display type:  QVGA display 
Weight:  less than 1.75 lb (0.8 kg) 
Battery:  none 
Battery life:  none 
Waterproof:  yes (IPX7) 
High-sensitivity receiver:  yes 
Antenna:  internal 
NMEA input/output:  NMEA 0183 compatible 

Maps & Memory:
Basemap:  yes 
Preloaded maps:  yes (inland maps) 
Ability to add maps:  yes 
Built-in memory:  none (cannot load maps to internal memory) 
Accepts data cards:  SD™ card slot 
Waypoints/favorites/locations:  3,000 
Routes:  100 
Track log:  10,000 points; 50 saved tracks 

Features:
Garmin radar compatible:  no 
Garmin sonar compatible:  yes 
CANet® compatible:  no 
Garmin Marine Network™ compatible:  no 
Touchscreen:  no 
Supports AIS (tracks target ships' position):  yes 
Supports DSC (displays position data from DSC capable VHF radio):  yes 
Audible alarms:  yes 
Tide tables:  yes 
Hunt/fish calendar:  no 
Sun and moon information:  yes 
3-D map view:  yes (with optional BlueChart g2 Vision card) 
Auto Guidance:  yes (with optional BlueChart g2 Vision card) 
Automatic routing (turn by turn routing on roads):  no 
XM WX Weather & Radio for U.S. compatible:  no 
Voice prompts (e.g. "Turn right in 500 ft."):  no 
Speaks street names (e.g. "Turn right ON ELM STREET in 500 ft."):  no 
Remote control:  no 
Headphone jack/audio line-out:  no 
Audio/video input/output:  no 
Portable:  no 
Automotive/motorcycle-friendly:  no 

Inland Lakes
Comprehensive coverage of thousands of freshwater lakes throughout the continental U.S. and parts of Canada.

BlueChart g2 Vision
Highly detailed offshore marine maps, plus satellite imagery, enhanced 3-D maps, Auto Guidance technology, aerial photographs and coastal roads with points of interest.

Inland Lakes Vision micro SD card with adapter.
Comprehensive coverage of thousands of freshwater lakes throughout the U.S. plus satellite imagery, enhanced 3-D maps, and Auto Guidance technology. Maps are conveniently recorded on a micro SD card for the easy computer-free installation. Compatible with the GPSMAP 4000 -7000 and 400 - 700 series chartplotters.

BlueChart g2 on micro SD card with adapter
Detailed offshore BlueChart g2 marine maps to help you navigate — plus enhanced 3-D maps and rich detail and content. Maps are conveniently recorded on a micro SD card for the easy computer-free installation. Compatible with the most chartplotters and handhelds with an SD card slot.

Garmin Extras
Additional maps and software

LakeVu HD
Displays points of interests, including docks, designated fishing areas, campgrounds, boat ramps, marinas and bridges. Shows interstates, highways and general roads. Shows underwater features, such as riverbeds, bridges, roads, fish attractors and potential hazards. Offers Safety Shading, which lets you input and shade a minimum depth to help you avoid running aground. Many lakes with many with 1' contours throughout