OWS Calibration requirements

03 September 2018 |  C18043

Following a recent Flag State Inspection on board of a vessel, a deficiency was noted that the OWS Calibration Certificate was not found on board. This Circular would like to remind Shipowners on the OWS equipment calibration requirements.

Ship Owners/ Managers/ Operators | Surveyors / Auditors

The Marine Environmental Protection Committee through the Resolution MEPC.107(49) adopted the revised Guidelines and specifications for pollution prevention equipment for machinery space bilges of ships.

The Resolution details the requirements for the Calibration of 15ppm Bilge Alarms.

The accuracy of the 15 ppm Bilge Alarms should be checked at IOPP Certificate renewal surveys according to the manufacturers instructions.

Alternatively, the unit may be replaced by a calibrated 15 ppm Bilge Alarm. The calibration certificate for the 15 ppm Bilge Alarm, certifying date of last calibration check, should be retained onboard for inspection purposes.

The accuracy checks can only be done by the manufacturer or persons authorized by the manufacturer.

Act now

Shipowners / Managers / Operators / Surveyors should take into consideration above reminder on the need for recalibration of OWS equipment by the manufacturer or an approved competent person during their vessels IOPP renewal surveys.

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