... Display Modes:Head-up, Course-up*, True motion***Heading input required *Heading and speed inputs required 3. Range Scales( ... Continuous 5. Interface (NEMA 0183 format) --: any talker (menu selection)Input$--APB, $--BWC, $--BWR, $--DBK, $--DBS, $--DBT, $--DPT, $--GGA, $--GLC, ... /bearing and CPA/TCPA(Heading data and speed data input required)Environment Temperature-15 to + 55 (Display unit)-25 to + 70 ...