Ships and marine technology-Transmitting Headin Devices (THDs) - Part 1: Gyro-compasses
1 Scope
2 Normative references
3 Terms and definitions
3.1 gyro-compass
3.2 heading
3.3 sensing part
3.4 transmitting part
3.5 true heading
3.6 transmission and resolution error
3.7 static error
3.8 dynamic error
3.9 follow-up error
3.10 settled
3.11 settle point heading
3.12 settle point error
3.13 error
3.14 latitude error
3.15 speed error
3.16 master compass
3.17 scorsby table
3.18 intercardinal motion
4 Performance requirements
4.1 Functionality
4.2 Continuous operation
4.3 Information
4.4 Fore and aft mark
4.5 Speed error correction
4.6 Heading information
4.7 Status indication
4.8 Alarm signal
5 Accuracy
5.1 Accuracy of transmission data
5.2 Accuracy under static conditions
5.3 Accuracy under dynamic conditions
6 Type tests
6.1 General
6.2 Settling time test
6.3 Static error (Settle point error) test
6.4 Settle point heading repeat ability test
6.5 Settling time on a Scorsby table
6.6 Scorsby test
6.7 Intercardinal motion test
6.8 Output accuracy test
6.9 speed error correction test
6.10 General requirement test
6.11 Electromagnetic compatibilty test
7 Marking and identification
