通告2对于航行于冰区事项（英文）

　SAFETY INSTRUCTION / NOTICE DHM-1002 21st Jan., 2010 To: The Masters Re: Basic Recommendations for Winter Navigation

　Recently we have noted that some vessel encountered problem with ice accumulation on main deck and ship fittings frozen during winter navigation. We hereby provide you below recommendations to the Masters of our fleet ships while staying or navigation during the winter period of low air temperatures.

　Basic Recommendations 1. If you navigate in the areas where sea Ice is expected, during the night it is

　recommended to have a searchlight on continuously pointed forward. From experience you will see small pieces of Ice in sufficient time to reduce speed and safely enter the ice. 2. You may experience Freezing Spray or Severe Freezing spray. It is strongly recommended to avoid Ice buildup aboard the vessel. Sometime it maybe necessary to reduce speed to bare minimum, but remember, you may loose 12 - 18 hours on your ETA, but you"ll avoid 2 - 3 days of clearing Ice in the harbour. In case of reducing ship•s speed is becoming necessary, Master is requested to report the situation to charterer to obtain Charterer•s approval. Freezing Spray is a very important item. If possible all precautions should be taken to avoid Ice accumulation on the main deck. You should expect Freezing spray when wind is from NE, N, NW, WNW, W and with speed above 15 knots. The best way to avoid it is a course alternation or reduction of speed. Effects of freezing spray are diminishing when wind is more than 45 degrees from the bow. Any Course and speed change to be done in consultation with Charterer and our Company. 3. During hours of darkness, watch Personnel must maintain frequent watch over the main deck area for the excessive Ice build up, if there is ice then appropriate avoidance action must be taken. 4. In case of severe spray (temperatures less than minus 15 and wind above 35 Knots) Master shall consider to anchor vessel at a safe anchorage to wait storm pass.

　5. All pipelines on the open decks must be empty and dry, this should be done prior entering cold weather. 6. Ballast Valves (If not filled with water ) should be crack open to avoid freezing and damages, these should be at this position until arrival 7. Fire line, steam line should be empty and dry. 8. Ballast tanks stripped as much as possible. (if vessel is loaded) 9. If in Ballast Condition ? All ballast tanks should not be pressed up and it is recommended not to exceed 90PCT. Always consistent with the Minimum Ice draft per Class requirement. 10. Fresh water tanks should not be filled more than 90 PCT to avoid expansion and damages if frozen. 11. Additional heating should be provided to the Bridge to protect equipment. 12. Mooring lines should be kept inside and taken out only prior arrival at the dock. 13. Mooring winches should be tested and run at least 3 - 4 hour prior arrival. 14. Pilot ladder should be kept in protected area and deployed in last moment and only when pilot boarding. 15. If vessel is operating in Ballast condition, steam hose should be connected to Sea Suction intakes for Main Engine and Generators to avoid black-outs. 16. Draught aft should be maximum as possible. Always consistent with Fwd Draft as per Class requirement. 17. Prior arrival Pilot Station both anchors must be de-iced and moved up and down IN GEAR to make sure they are free. 18. Lifeboat Fresh Water if in containers to be placed in protected area to avoid freezing. 19. Lifeboat Engines and Emergency Fire pump should be run rested and run on daily basis. 20. If the vessel is not properly insulated, then accommodations fresh water piping systems should be circulated to avoid freezing. 21. Vessel should be supplied with wooden mallets and salt for Ice removal. 22. Lifeboat Engines, Booster Pumps and exposed generators should be drained of water. 23. When Navigating in Ice soundings of empty tanks must be taken on frequent basis (6 Hours or so). 24. When the ship is in the port during the winter period under the negative ambient temperatures the Masters of the ships are recommended: - Keep the holds or openings closed and the temperature inside above 00C whenever

　possible. - Holds are to be opened right before the beginning of cargo operations and closed as soon as same are completed or interrupted. - Steady monitoring of any changes in ships draft while under cargo operations as well as their careful analysis or coordination as per quantity of received or discharged cargoes. In case of any doubt in ice formation at the ship bottom, please report to company immediately, diver inspection might to be arranged and possible measures for the ice eliminating at the ship bottom to be taken. - Vessel windlass, mooring equipments, crane and hatch cover operation to be very carefully especially while start motors.

　De-Icing Procedures: If the vessel is able to operate windlass, winches,

　bollards, lifesaving and fire equipment then small amount of ice in the focs"le area is not an immediate concern. If the vessel unable to use above equipment due to frozen and iced up, then it is strongly recommended to commence de-icing procedures; Providing water temperature is more than 10 C and air temperature - 5C and above then the best method of de-icing is to use vessel"s deck foam applicators monitors and/or fire hoses to apply large amount of water in the affected area to get rid of ice. From experience water will not damage your equipment and been proven the best method to remove ice. After ice is gone and prevailing conditions are such that equipment is still frozen and difficult to operate, then it is recommended to steam for a final touch up. After completion of de-icing procedures, all drains and valves on the fire/butherworth lines and drain on the main deck should be open. For de-icing of small areas and when in extreme cold weather then use of the wooden mallets to remove ice from valves, manifolds, windlass etc is recommended. Great care must be taken to prevent any damages as a result of striking. Master•s Checklist Master is requested to send confirmation report to

　company before the vessel enter an areas where sea Ice is expected. a. Request the most updated ice chart available, convoy formation point (CFP) location and names

　of the ice-breakers from your Agents in advance. b. Check that your VHF radio is operative, find out in advance the channel used by the ice-breakers operating in the area. c. Check that the pipes on deck are drained of water. d. Check that the sounding and air pipes of the ballast tanks are emptied of water. e. Check that anchor wheels and other equipment which may be used in ice conditions are covered by adequate tarpaulins (to prevent icing). f. Keep the pilot ladder in a sheltered place and, before use, make sure it is not ice covered. g. Test the searchlights in advance. h. Check that the propeller is completely below the water surface. i. Check that cooling water is available when navigating in ice. j. Avoid colliding with loose ice floes in high speed, check your open-water speed. k. Ensure that your Officers also study the instructions. Remarks: Photos enclosed in this circular was provided by one of our managed vessel while she proceeding to Tianjin, China on 21st Jan 2010. Important: Master is reminded to check your C/P clause 24 Ice, if your vessel shall not be required to enter or remain in any icebound port, please urgently contact your Charterer and note sea protest accordingly. Yours faithfully,

　C/E JIANG MINGLIANG Chief of Marine Administration Ship Management Dept.

　KEEP FILE IN YOUR OFFICE AND TURN OVER TO YOUR SUCESSOR WITHOUT FAIL