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Input/Output Description
The CH-250 can receive/transmit the following sentences in NMEA 0183 format.
Input
• GLL: GPS position
• VTG: Ground speed/true course
• DBT: Depth (Ignore talker, NMEA Ver1.5)
• DBS: Depth (Ignore talker)
• DPT: Depth (Ignore talker, NMEA Ver2.0)
• GGA: GPS position/Speed/Course (Ignore talker)
• VDR: Current direction/current speed (Ignore talker)
• RMA: Loran C position/LOP/Speed/Course
• RMC: GPS position/Speed/Course
• VHW: Water speed/Heading
• HDG: Heading
• MTW: Temperature
• HDM: Heading
• HDA: Temperature (Ignore talker)
• HDT: Heading
Output
• TLL: When entering event mark.
Priority (Input)
Own ship’s position GGA>RMC>RMA>GLL
LOP can be displayed only when RMA is inputted.
Course RMC>RMA>VTG
Heading HDG>VHW>HDM
Speed RMC>RMA>VTG>VHW
Depth DPT>DBT>DBS
Temperature MTW>MDA
Current VDR