TOPIC 4 - DRYDOCKING, PORT OF REFUGE AND SAFEGUARDING OF CARGO Flashcards
1. Drydocking (a) State particulars to be provided to dockmaster and records of previous drydock (b) State the optimum conditions for drydocking (c) State the precautions to be taken in drydock (d) State the precautions to be taken before undocking (e) State the precautions to be taken during undocking (f) State the specific precautions to be taken when drydocking with a full or partial cargo 2. Port of refuge (a) Discuss the choice to be made when selecting a port of refuge (b) Show an (446 cards)
What document would you expect your owners to give you a copy of when you are taking your ship into drydock?
The Drydock and Repair Specification.
What would you expect the contractor (i. e. the repairer or drydock company) to have to supply to the ship under its contract with the owners?
(1) Fire guards;
(2) fire extinguishers;
(3) connection of fire hoses to yard’s main;
(4) sea water cooling of refrigeration and air conditioning condensers;
(5) containers for collection of scrap and debris left over from repairs;
(6) containers for collection of ship’s garbage;
(7) telephone on board;
(8) emergency contacts list;
(9) electric current;
(10) possibly an earth return;
(11) two illuminated gangways;
(12) gas-free certificates from authorised chemist if requested or deemed necessary;
(13) drinking water;
(14) craneage;
(15) unmooring and mooring in drydock with assistance of yard tugs, pilots, boatmen and riggers.
Your ship is about to enter ‘Dry Dock’, what documentation and plans are you most likely to require to be readily available?
The Dry Docking Plan.
The ‘Shell Expansion Plan’.
The ‘General Arrangement Plan’.
The Chief Officers ‘Repair List’.
The Stability Information Plans and general particulars of the vessel.
A Tank Arrangement Plan.
The ‘Plug Plan’ if not incorporated into the ‘Dry Dock Plan’.
The Rigging Plan.
The Ships Fire Fighting arrangement.
Cargo plan (if appropriate).
Relevant certificates for respective survey work.
In the event that your vessel had to enter dry dock with cargo on
board, what precautions would you expect to take ?
Entering dry dock with cargo on board is not a desired option and all effort would normally be made to discharge the cargo prior to entry. However, such handling costs would be expensive and the shipping company may insist that the cargo remains on board.
In such circumstances it would depend on the weight and distribution of the cargo, its value and whether it was pilferable. In every case the main concern would be the additional stresses that would be incurred by the weight of the cargo and additional dock shores would need to be ordered in place to support the
unexpected weight.
These shores would need to be placed before the dock is flooded in the majority of cases.To do this the Dry Dock manager would require sight of not only the ‘Docking Plan’ but also the Cargo Plan.
Special cargo or valuable cargo would require lock up stow, and security services to prevent theft.
Why is a ship dry-docked?
a. For a vessel to maintain its Class Hull certificate and Safety Construction Certificate , and to comply with operational requirements.
b. In cases like collision or under water damage the vessel will be brought in for unplanned dry docking for repairs.
How often is a ship dry-docked.
a. A docking survey should be carried out twice within a 5 year period. The intermediate survey must be completed within 3 years. One of the two docking surveys within the 5 year period should coincide with a special survey. A Docking Survey is considered to coincide with the Special Survey when held within the 15 months prior to the due date of the Special Survey. An in water survey may be accepted in lieu of the intermediate survey.
For vessels operating in fresh water special consideration may be given.
Discuss the steps you would implement:
before drydocking;
Preparing the Ship for Dry Docking
a) Consult the dock master for draft and required trim.
b) The dock master will want the docking plan to position the blocks in the dock.
c) Consult on which blocks can be left clear for repairs and maintenance.
d) Prepare all necessary documenation which may be required to complete the docking operation and the expected workload inside the dock.
e) Calculate that the ship has adequate positive stability to withstand the expected ‘P’ force that will affect the vessel when taking the keel blocks. The GM should be large enough to compensate for a virtual rise in ‘G’ once the keel touches the blocks and the vessel enters the critical period.
f) Complete any ballast operations to satisfy the docking requirements regarding list and trim
g) Reduce any free surface activity within tank levels where possible
h) Secure any large pieces of equipment or cargo.
i) Brief the ships Chief Officer of the need to obtain ‘wet soundings’ as well as ‘on the block’ ‘dry soundings’.
j) Turn stabilisers into their stowed position
k) Withdraw any engine room bottom speed logs into the stow position
l) Lower any cranes or derricks to the stowed sea-going position
m) Close all hatches to ensure continuity of strength throughout the length of the vessel
n) Have the repair and maintenance list ready.
o) Create a dry-dock handbook if required, and assign responsible ship staff to their duties on the list.
p) Divide staff into groups to oversee the work carried out by yard gangs.
q) All spare parts must be checked and repair items kept ready for use.
r) Previous dry dock reports should be studied and previous clearance measures noted.
s) Clean engine room tank top and bilges.
t) Prepare sewage treatment tanks, dirty oil tanks and bilge tanks.
u) Flushing of bilge lines is to be carried out prior to dry dock.
v) The oil-water separator filter element should be renewed and the system checked for satisfactory operation.
w) For tankers, all cargo tanks are cleaned and gas freed.
x) Minimum bunkers (Fuel Oil and Fresh water) and ballast carried.
y) All heavy weights secured prior to dry dock.
z) All tanks and cofferdams must be sounded and recorded.
aa) Fire fighting plans and safety measures discussed before dry dock
bb) Fire fighting equipment on board should be checked and kept ready for use.
cc) Emergency lighting and generator should be tested before entry.
dd) Escape routes must be clearly marked.
ee) All valves and chests to be overhauled must be clearly marked.
ff) Shore connections for cooling water and fire line are to be readied.
gg) Main engine, generators, and boiler are changed over to diesel oil.
hh) CO2 total flooding systems are secured and locked before entry.
Discuss the steps you would implement after drydocking,
a) Once the ship sits properly on the keel blocks, fire hydrants, safety signs and a shore gangway is attached to it.
b) Walk the dock
c) Check the hull for any unknown damange.
d) Ensure ship is sitting correctly on the blocks.
e) Check that she is sitting evenly on the blocks.
f) Set up the gangway watch.
g) Have a dock work conference with responsible parties from ship repairers.
h) Set down the ship’s safety rules.
i) Confirm the ship yard’s safety rules.
j) Safety personnel then inspect the ship and mark dangerous areas on it with a Red tape. This is done so that hot work can be carried out with care. An example of such an area would be the fuel oil tanks.
k) Application for all the necessary permits are then made. These permits include hot work permit, cold work and enclosed space permits. Gas checks are also carried out in enclosed spaces every day to ensure maximum safety
l) Mate collects any plugs and labels and keeps them in his office.
m) Work is detailed off to the respective crew members.
Discuss the steps you would implement before flooding the dock
a) Ensure all the listed work is completed to a satisfactory standard.
b) In particular that all ‘survey work’ is completed, prior to leaving the dock.
c) The Chief Officer must sight all the tank plugs being replaced.
d) Walk the dock with the Mate, Chief Engineer and the shipyard manager.
e) Carry out an external inspection of the hull
f) Ensure that no vehicles, materials or personnel are remaining in the dock, prior to commencing any flooding operation.
g) Have the crew make the vessel ready for sailing.
h) Plan the ships movement from the dock, carrying out checks on all navigation equipment and make the relevant entries into the deck and offical log books.
i) Post the sailing board and cancelling shore leave,
j) Place the engine room and respective personnel on standby,
k) Ensure that a full set of tank soundings have been taken and that adequate supplies of fresh water, fuel and lubricating oil are on board to suit the ships movement needs.
l) These tank quantities would then be applied to a complete stability check to ensure that the vessel has an acceptable GM once she floats clear of the keel blocks. Stability checks are the sole responsibility of the ships personnel and comparison should be made between the entry soundings when the vessel was last afloat.
m) All hatch covers would be closed up and the watertight integrity of the uppermost deck assured.
n) Anchors and cables would be heaved up and stowed correctly aboard the vessel.
o) All pipelines, power lines etc. would need to be disconnected and relevant manpower should be made available both ashore and aboard the ship in order to release these safely and at the appropriate time.
p) Pilot and tugs ordered.
q) If satisfied that the ship is ready for floating, sign the Authority to Flood Certificate.
r) Keep a sharp eye on the ship during the critical period.
Describe the ship actually docking.
a) When the ship is near the entrance of the dock, a crane is used to lift wires to secure the whip to the dock winches.
b) Two winches are secured at the aft end and two at the forward end of the ship.
c) These winches are used to guide the ship into the dock and bring it to the exact spot at which it should be laid on the keel blocks.
d) Once the ship is brought directly above the keel blocks on which it will be laid on, divers are sent in the dock to ensure the ship sits exactly over the keel blocks
e) The vessel is held in position and the dock is emptied.
f) The pump room located at the forward end of the dock controls the rate of water being pumped out of the dock. This process can also be referred to as de-ballasting the dock.
g) Slow down the rate that the water is pumped out of the dock just before the vessel takes the blocks aft and during the critical period.
h) Speed up pumping once the vessel has taken the blocks overall.
i) Walk the dock once the dock is empty.
List the work routinely done in drydock
a) Hull cleaned of marine growth.
b) Painting with anti-corrosive and anti-fouling paints. Sacrificial anodes renewed.
c) Hull inspection and repairs.
d) Shipside gratings cleaned and repaired. All overboard and sea suction valves overhauled.
e) Cleaning and surveying of tanks.
f) Rudder, locking devices clearances examined.
g) Propeller damage, nut looseness, blade polishing done.
h) Tail shaft bearing wear down checked.
i) Tail shaft removed and inspected. Coupling bolts and holes deformation.
j) Anchor chain examined, cleaned and re-marked.
k) All underwater stuffing boxes repacked.
What are the stability requirements for dry docking a ship?
a) Adequate Initial G.M: When the ship touches the blocks, there is a reaction at the point of contact which raises the centre of gravity “G” and reduces the metacentric height “G.M” so that adequate initial metacentric height is required to compensate the same.
b) Vessel to be Upright: While entering the dock the vessel needs to be upright which means there should be no port or starboard list when the ship touches the blocks, the point of contact will be outside the centre line of vessel, which may force the vessel to tip over.
c) Small or Moderate Trim Aft: The slight trim allows the accenting of stern and bow in tandem rather than simultaneously as it will reduce the load and pressure on hull and the keel of vessel.
d) Calculate that the ship has adequate positive stability to withstand the expected ‘P’ force that will affect the vessel when taking the keel blocks. The GM should be large enough to compensate for a virtual rise in ‘G’ once the keel touches the blocks and the vessel enters the critical period
e) Pressed up or empty tanks: To enhance the positive stability all slack tanks, and subsequent free surface effects should either ‘pressed up’ or alternatively pumped out if possible.
f) Loose cargo or equipment. To prevent any heeling moments occurring unexpectedly, all large items of equipment and any cargo, if onboard, must be well secured.
Same situation is required when wanting to leave the dock.
What are shores when used in dry docking a ship?
Horizontal supports, usually timber employed between the stepped sides of a graving dock and the ships side shell plating. Ideally shores would be positioned in way of deck stringers and framed intersections of the ships steel work.
What is the critical period in the dry docking process?
What logbook entries should be made for a vessel entering drydock?
The period of time from the critical moment when the keel of the vessel first touches the line of blocks to the instant when she has taken the blocks overall. When is resting with her full length on all the blocks, aft to forward. Sometimes named the position of being ‘sewn’ on blocks.
What logbook entries should be made for a vessel entering drydock?
- Pilot, name
- Tugs ( by name) engaged fore and aft or as engaged
- Vessel proceeding towards open lock
- Line ashore foward and aft
- Tugs dismissed
- Moorings carried up port/starboard
- Stern clears gates
- Vessel stopped making headway inside the dock
- Dock gates closed
- Moorings checked to hold vessel
- Moorings adjusted to align ship fore and aft
- Dock pumps commenced pumping out dock water
- Block contact made
- Vessel takes blocks overall
- Side shores passed to port and starboard
- Residual water cleared from dock
- Gangway access landed between shore and ships side
- Gangway walkable
- Pilot dismissed
- Pumping of the dock complete and dock floor walkable
What are the duties of the OOW with the vessel in drydock?
- At all times he or she remains the Master’s representative.
- Adhere to company ISM procedures.
- Carry out dry dock functions allocated by the Chief Officer
- Manage the crew allocated to deck watch.
- Maintain:
- a safety watch
- a fire watch
- a security watch
- a watch for pollution incidents
- contact with the drydock manager/representative/foreman
- the fire line connection
- the log book
- list of tanks emptied and filled
- Ensure that work permits are adhered to.
- Ensure compliance with dock regulations
What are the duties of a coastal State regarding a ship seeking a port of refuge.
There are no specific duties that a coastal State has to undertake when considering a call for a place of refuge. There are IMO guidelines and these provide good information, however coastal States are not bound by them; they remain guidelines.
The “Prestige” disaster highlighted the tension between the economic, environmental and political interests of coastal states vs. the consequences of a ship deteriorating and breaking apart at sea. It also showed there was a legal and regulatory vacuum regarding the responsibilities of the world’s coastal states to mitigate environmental catastrophes.
However, for the Coastal State to evaluate the request and consequences to the vessel/environment should the vessel remain in place, continue on its voyage or proceed to a place of refuge, it should:
Obtain information on the status of vessel & crew, assistance sought, anticipated needs at refuge, and mitigation by the vessel;
If time permits, activate a “unified command” and consult with “stakeholders”;
Evaluate risks to human health, safety & the environment;
Determine response & salvage/repair resources; and
If the risks weigh in favor of granting refuge, point out the best location for refuge (port, anchorage or breakwater area), firefighting and repairs.
Further, the Port should appoint a “communications director” to interact with state agencies, media, COTP, immigration, customs, security and salvage. And the need for a good public relations campaign and damage control due to the political impact cannot be underestimated.
Finally, the Port should create a “contingency response plan” to deal with an urgent port of refuge request.
Define a ship in need of assistance.
Is this in distress?
“Ship in need of assistance” means a ship in a situation, apart from one requiring rescue of
persons on board, that could give rise to loss of the vessel or an environmental or navigational
hazard.
No, she is not in distress, but her problem could worsen, putting her in distress.
What are the Master’s concern’s when deciding on a port of refuge?
When deciding upon port of refuge, guide to port entry, owner’s suggestions, underwriter’s suggestions are to be considered. Can the port be reached safely? (Enough fuel, extent of damage).
Are the port authorities friendly/hostile?
Can the vessel enter port and remain in safely?
Repair facilities in the port.
Cost of repairs reasonable?
Can cargo be discharged/stored?
Crew repatriation facilities.
Can owner’s representatives enter/leave freely?
Spares/stores readily available?
Can ship’s spares/stores imported easily?
Survey facilities available.
Port free of war, strikes, civil commotion?
Are required charts onboard?
What procedure should be adopted by the Master when the ship has entered a port of refuge? Issue note of protest, reserving the right to extend it.
Inform owner, charterer of the ship’s safe arrival.
Inform the Flag State and the Class about the damage.
Inform underwriter in accordance with tender clause.
Inform P&I agent and underwriter’s surveyor.
If cargo to be discharged, GA adjustor and qualified independent cargo surveyor to be present before breaking bulk .
Arrange damage survey by Flag State and Class.
After receiving surveyor’s report/ recommendation, call for tenders with advice from underwriter representative for temporary repairs to enable vessel to complete voyager. .
Arrange repairs under supervision of Flag and Class surveyors and the underwriter’s surveyor.
After repair, arrange survey.
Arrange for a temporary certificate permitting voyage to discharge port or repair port where permanent repairs will be carried out.
A proper record to be kept commencing from the time of deviation to port of refuge.
Copies to send to owner for P&I claims.
Full details of damage and repairs, copies to be dispatched to owner.
The ship can be cleared for resume voyage.
Issue note of protest, reserving the right to extend it.
Inform owner, charterer of the ship’s safe arrival.
Inform the Flag State and the Class about the damage.
Inform underwriter in accordance with tender clause.
Inform P&I agent and underwriter’s surveyor.
If cargo to be discharged, GA adjustor and qualified independent cargo surveyor to be present before breaking bulk .
Arrange damage survey by Flag State and Class.
After receiving surveyor’s report/ recommendation, call for tenders with advice from underwriter representative for temporary repairs to enable vessel to complete voyager. .
Arrange repairs under supervision of Flag and Class surveyors and the underwriter’s surveyor.
After repair, arrange survey.
Arrange for a temporary certificate permitting voyage to discharge port or repair port where permanent repairs will be carried out.
A proper record to be kept commencing from the time of deviation to port of refuge.
Copies to send to owner for P&I claims.
Full details of damage and repairs, copies to be dispatched to owner.
The ship can be cleared for resume voyage.
Under what circumstances would you decide to make a port of refuge?
When a ship is in need of assistance but the safety of life is not involved. Where the safety of life is involved, the provisions of the SAR Convention should be followed.
Port of refuge is required when a ship has suffered an incident that beings her seaworthiness into doubt and she requires the protected waters of a place of refuge to carry out repairs, etc. to be able to continue her voyage to a proper port.
When a ship has suffered an incident, the best way of preventing damage or pollution from its progressive deterioration is to transfer its cargo and bunkers, and to repair the casualty. Such an operation is best carried out in a place of refuge. However, to bring such a ship into a place of refuge near a coast may endanger the coastal State, both economically and from the environmental point of view, and local authorities and populations may strongly object to the operation.
Therefore, granting access to a place of refuge could involve a political decision which can only be taken on a case-by-case basis. In so doing, consideration would need to be given to balancing the interests of the affected ship with those of the environment.
What is general average?
It is a sum of money that all parties to the venture have to pay to any one member who suffers a partial loss during the voyage. If a cargo owner does not pay his contribution, then the ship owner will have a ‘lien’ on the cargo.
What are the conditions to claim general average?
Common Maritime Adventure - More than one party must be involved in the adventure so as to be ‘common’ (shipowner, cargo owner). For a sacrifice or expenditure to be subject of general average contribution, there must be a danger common to all parties involved in the adventure.
Common Safety - All parties must have been actually benefited by the sacrifice due to a peril that endangered all the interests at risk.
Peril must be real, whereas not necessarily actual calamity. Mistaken decisions that lead to unnecessary sacrifices do not allow general average claims.
Extraordinary loss must be distinguished from ordinary loss because the latter is not allowed for general average contributions. Extended voyage time because of bad weather, leading to unnecessary fuel consumption, crew wages, etc. is ordinary loss, while damage by emergency docking is extraordinary.
Intentional decisions must be made and the loss must be voluntary.
Reasonableness is prerequisite. Unreasonable and unnecessary sacrifice or expenditure is not valid.
Success must characterize the actions of preserving the property involved in a common maritime adventure from a particular danger, to be able to allow general average contribution for the losses immersed by that effort.
General Average is in antithesis from Particular Average where loss is caused by accident and the loss lies where it falls, while in the former, intentional and reasonable loss is involved and expenses are adjusted among all parties.
General Average claims shall be adjusted in respect to both loss and contribution upon the basis of values at the time and place, where and when the adventure ends. General average clause is included in all charter parties and specifies where the adjustment will take place.
The values on which the contribution will take place are three:
1. Net value of the ship
2. Net value of the cargo
3. Percentage of freight loss
Exclusions from contribution are life, passengers’ luggage, crew wages and provisions of the ship.
The burden of proof lies on the party claiming in general average to show that the loss or expenditure claimed is correctly allowable as general average.
What is the purpose of General Average?
To ensure that the owner of a ship or cargo who has incurred an expenditure or suffered a sacrifice of his property in order to extricate the ship (and consequently the cargo) from a perilous position receives a contribution to his loss from all those who have benefited from the action.