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Fos ter i ng Saf et y Exce l l ence & Sus ta i nab l e Sh i pp i ng

S A F E T Y 4 S E A We e k l y F l a s h M a i l 2 0 1 5 - 4 4


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loading. During voyage moisture content may vary due to drainage and possible water ingress into cargo

hold. To avoid increased moisture content, care should be taken if loading is carried out during heavy rain.

Cargo hatches should be kept closed, except when opened for loading. Both during loading and voyage,

cargo in holds should be monitored for excess water or other signs of liquefaction risk, such as flattening of

the cargo or fluid flow.

Vessel motions and GM

Metacentric height of vessel should be carefully considered when carrying cargoes that may liquefy. An

excessive GM value results in shorter rolling periods and high accelerations which may trigger liquefaction. If

loading condition and structural strength of vessel allow it, centre of gravity of vessel could be raised by

ballasting the top wing tanks or by loading cargo in a non-homogeneous pattern. Weather routing is

recommended in order to avoid excessive motions

Trimming of load to avoid shifting/ sliding

Trimming cargo is a well-known method for reducing risk of cargo shift or cargo sliding. In addition, stability

and weight distribution are improved. On the other hand, trimming increases required time and cost for

loading. When carrying cargoes that may slide, cargoes should be trimmed as necessary to ensure that they

are reasonably level. [More…


4/ USCG issues FAQs on towing vessel radiotelephone

USCG Towing Vessel National Center of Expertise posted new FAQs to provide information on when a

towing vessel is required to have its bridge-to-bridge radiotelephone station inspected and obtain a bridge-to-

bridge certificate. All towing vessels 26 feet in length or greater subject to the Communications Act of 1934

(CA) , the Great Lakes Agreement (GLA) or other vessels that have been inspected for compliance with

Bridge-to-Bridge Act (BBA) per the below guidance.

- Seagoing towing vessel 300 GRT or greater and 26 feet in length or longer. Vessel is subject to the CA and

the BBA. The radiotelephone station needs to be inspected for compliance with the CA and BBA every 12


- Great Lakes towing vessels 26 feet in length or longer. Vessel is subject to the GLA and the BBA. The

radiotelephone station needs to be inspected for compliance with the GLA and BBA every 13 months.

- Seagoing towing vessel less than 300 GRT and 26 feet in length or longer or an inland towing vessel of any

GRT and 26 feet in length or longer. Vessel is NOT subject to CA or the GLA. This vessel would only have to

comply with the BBA. The FCC inspection and certification requirements for this type of vessel state,

“…bridge-to-bridge stations will be inspected from time to time.”

- Towing vessels less than 26 feet in length


Vessel would not be subject to the CA, GLA or the BBA. No

inspections or documentation required for compliance. [More…



1/ Amendment of IMO’s Guidelines for the development of the IHM

ClassNK has issued Technical Information to provide information about the amendment of IMO’s guidelines

for the development of the Inventory of Hazardous Materials regarding the Ship Recycling Convention which

it was deliberated in MEPC 68 (May 2015) and it was adopted as the Resolution MEPC 269 (68). The outline

of the amendment is shown in the appendix to this technical information. The main contents are changes or

clarifications on the threshold value of the hazardous materials to be indicated on the Material Declaration

(MD) and on how to describe the inventory for the purpose of easier development of the inventory for new

ship. Inventories which will be undertaken to develop after 15 May 2015(Note 1) are required to develop in

compliance with the RESOLUTION MEPC.269 (68). ClassNK has reviewed its “Guidelines for the Inventory

of Hazardous Materials” in order to implement the RESOLUTION MEPC.269 (68). The revised ClassNK

“Guidelines for the Inventory of Hazardous Materials” can be downloaded from the ClassNK website. While,

necessary improvements are being carried out on the system “PrimeShip-GREEN/SRM” and it will be

available by 1 November 2015.

ClassNK will treat the inventories for which the applications are made on or after 1 November 2015 as ones

which are undertaken to develop after 15 May 2015 and examine them according to the RESOLUTION

MEPC.269 (68) [More…