13.16.1 To assist in casualty investigations,
passenger craft irrespective of size and cargo craft of 3,000 gross
tonnage and upwards shall be provided with a voyage data recorder
(VDR).
13.16.2 The voyage data recorder system, including
all sensors, shall be subjected to an annual performance test. The
test shall be conducted by an approved testing or servicing facility
to verify the accuracy, duration and recoverability of the recorded
data. In addition, tests and inspections shall be conducted to determine
the serviceability of all protective enclosures and devices fitted
to aid location. A copy of the certificate of compliance issued by
the testing facility, stating the date of compliance and the applicable
performance standards, shall be retained on board the craft.