Your vessel has run aground – captain has sent you C/O to oversee the deck team? What would you prepare? How would you delegate roles? What plans/checklists would you have as reference?
What considerations would you have regarding sending crew into a flooding compartment to make a repair
How could you calculate the pressure in which the water is flooding in?
12 Feb, 17:27
In emergency situation, such as running aground, a response scenario consists of three parts:
- damage assessment
- damage control
- recovery and repair
First two parts are governed by SOLAS and described in details in Damage control booklet and Damage control plan (both are parts of Damage stability booklet).
Prior sending crew to deck for situation evaluation, Damage stability booklet and Risk Assessment should be discussed during Toolbox. Damage control booklet contains information and guidance to the master in case emergencies including flooding (may be in form of flow chart).
Damage control Plan contains information regarding
- layout of all the compartments and tanks.
- means of tanks and comaprtments isolation: valves, watertight bulkheads, hatches or cargo tank domes
- means of pumping out of water: ballast pumps, Fire & GS pumps.
As head of Deck team, Chief Officer has to assign following responsibility between crew:
- soundings of ALL tanks: ballast, fresh water, cargo, bunker, lub oil
- sounding of ALL void spaces, hold spaces and cofferdams
- inspection of ship’s hull by available means for damages
- watch out for signs of pollution due to damage of FO/LO/Cargo tanks. Any observed pollution should be reported immediately to the authorities
- pumping out the water
Prior opening caps of sounding pipes crew must ensure there is no pressure by crack-opening of the cap. For compartments without sounding pipes, manholes to be opened with precautions: loose but do not remove all securing nuts and crack open manhole to check for pressure.
Soundings with respective calculated volumes and time along with observed damages should be marked on the General Arrangement / Tanks Plan to have clear picture of possible flooding. Soundings should be carried out regularly at constant intervals to calculate water ingress flow rate (volume of flow ingres divided by time interval).
Entrance to the flooded compartments require additional precautions because crew life is of paramaunt importance. Only compartments without water ingress or where ingress of water has stopped due to reaching highest level may be entered after ventilation of the compartment and Enclosed space permit obtained.
Ship’s crew has limited means of repair of hull damages. Only minor damages can be rectified by the cement box if have been noticed in time, f.e. in the ER. If hull has been severely damaged, vessel has to be kept afloat and towed to shipyard for proper repair.
14 Feb, 08:28