You can use optional memory cards with the chartplotter. Map cards allow you to view high-resolution satellite imagery and aerial reference photos of ports, harbors, marinas, and other points of interest. You can use blank memory cards to record Garmin Quickdraw™ Contours mapping, record sonar (with a compatible transducer), transfer data such as waypoints and routes to another compatible chartplotter or a computer, and use the ActiveCaptain^® app.

This device supports up to a 32 GB memory card, formatted to FAT32 with speed class 4 or higher. Use of an 8 GB or larger memory card with speed class 10 is recommended. An 8 GB memory card is included with GPSMAP^® 8x10/8x12/8x16 models.

Model	Memory Card Location	Memory Card Type
8x10	Back of the device	microSD®
8x12	Back of the device	microSD
8x16	Back of the device	microSD
8x17	External card reader	SD®
8x22	External card reader	SD
8x24	External card reader	SD
87xx	External card reader	SD