Piedinature - Pinouts
Lowrance AirMap 100, GlobalMap 100, GlobalNav 12, GlobalNav 200, GlobalNav 212

Reference and Sources:

Lowrance serial connector (6PIN)
Pin connector as seen from back of unit

Pin	Name	Description
1	VCC	Power
2	RX	RS-232 (receive serial)
3	GND	Ground
4	TX	NMEA/Pseudo RS-232 (transmit serial)
5	-	DO NOT USE (recharging purposes)
6	-	DO NOT USE (recharging purposes)

Piedinature - PinoutsLowrance AirMap 100, GlobalMap 100, GlobalNav 12, GlobalNav 200, GlobalNav 212