Section 13 in The Merchant shipping (Radio Direction Finders) Rules, 1968.
13. Records of calibration and verification.
- The Master of every ship shall cause the following records to be kept on board in a place accessible to an person operating the radio direction-finder, and to be available for inspection at any reasonable time by a radio inspector, namely".(a)a list or diagram indicating the condition and position, on the most recent occasion on which the radio direction-finder was calibrated, of"(i)the aerials, and(ii)all movable structures on board the ship which might affect the accuracy of the radio direction-finder;(b)the calibration tables and curves which were prepared on the most recent occasion on which the radio direction finder was calibrated,(c)a Certificate of Calibration in the form specified in the Third Schedule, relating to the most recent occasion on which the radio direction-1 as "calibrated and signed by the persons making the calibration;and(d)a record, in the form specified in the Fourth Schedule of check taken for the verification of calibration, the bearings being numbered in the order in which they were taken.
