.6 be capable of selecting automatically the appropriate satellite-transmitted signals for determining the ship's position with the required accuracy and update rate;
.7 be capable of acquiring satellite signals with input signals having carrier levels in the range of -130 dBm to -120 dBm. Once the satellite signals have been acquired, the equipment should continue to operate satisfactorily with satellite signals having carrier levels down to -133 dBm;
.8 be capable of acquiring position to the required accuracy within 30 min when there is no valid almanac data;
.9 be capable of acquiring position to the required accuracy within 5 min when there is valid almanac data;
.10 be capable of re-acquiring position to the required accuracy within 5 min when the GPS signals are interrupted for a period of at least 24 h but there is no loss of power;
5 FAILURE WARNINGS AND STATUS INDICATIONS
5.1 The equipment should provide an indication of whether the position calculated is likely to be outside the requirements of these performance standards.
5.2 The GPS receiver equipment should provide as a minimum:
