Transmission and Resolution Error
Transmission and resolution error: error which is caused by the method used to transmit the original information to a receiving device. Such method may have a limited capability to code any possible value of the information e.g. step output with 1/6º resolution. This error is caused by the method used inside the THD and at its output to code the information.
Source: IMO Resolution MSC.116(73), Recommendation on Performance Standards for Marine Transmitting Heading Devices (THDs), 1 December 2000, International Maritime Organization. Regulatory Guidance