8728ISO 8728:2014 specifies the construction, performance, and type testing for gyro-compasses required by Regulation 12 of Chapter V of SOLAS 1974 (as amended). General information.TS8728N Revision 2.1 - Page 4 of 14 8.0 Switch Truth Table Table 5 Switch Truth Table V1 Active RF Path 0 ANT-RX