3 Illustrations of segregation of containers on board hatchless containerships
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1440 – Illustrations of Segregation of Cargo Transport Units on Board Containerships and RO-RO Ships – (1 June 2012) - Annex – Illustrations of Segregation of Cargo Transport Units on Board Containerships and Ro-Ro Ships - 3 Illustrations of segregation of containers on board hatchless containerships

3 Illustrations of segregation of containers on board hatchless containerships

  3.1 The illustrations of this section apply to the segregation of containers which are transported on board hatchless containerships provided that stowage positions are properly fitted to give permanent stowage of the containers during transportfootnote.

  3.2 To determine locations in which containers are not permitted to contain dangerous goods that are incompatible with those in a reference container, the following method applies: container spaces (such as one container space, two container spaces) are identified in accordance with the applicable segregation provisions in the direct fore-and-aft and athwartship directions from the reference container. Lines are projected between the outermost corners of the containers occupying these spaces as shown in the figure. Containers located partially or complete completely between these lines and the reference container shall not contain dangerous goods that are incompatible with those in the reference container.

  3.3 The deck/hold layout used for the illustrations is:

  • - two 20' containers stowed in a 40' container space

  • - distance between two 40'container spaces is 2 feet/60 cm

  3.4 Explanation of the segregation terms

Note All bulkheads and decks shall be resistant to fire and liquids.

Note When an illustration has more than one reference container only one should be used when interpreting the illustration. When an illustration contains several references, containers they have to be considered as different examples.

Situation fore & aft + athwartships: 1 container space

Situation fore & aft: 1 container space & athwartships: 2 container spaces

Situation fore & aft: 2 container spaces & athwartships: 3 container spaces

Note All bulkheads and decks shall be resistant to fire and liquids.

“AWAY FROM” .1
CLOSED VERSUS CLOSED HORIZONTAL VERTICAL
ON DECK
FORE AND AFT No Restriction One on top of the other permitted
ATHWARTSHIPS No Restriction

1 Situation closed versus closed ON DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

7“AWAY FROM” .1
CLOSED VERSUS CLOSED HORIZONTAL VERTICAL
UNDER DECK
FORE AND AFT No Restriction One on top of the other permitted
ATHWARTSHIPS No Restriction

1 – Situation closed versus closed – UNDER DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

“AWAY FROM” .1
CLOSED VERSUS OPEN HORIZONTAL VERTICAL
ON DECK
FORE AND AFT No Restriction One on top of closed permitted

Otherwise

NOT in the same vertical line
ATHWARTSHIPS No Restriction

1 Situation closed versus open ON DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

“AWAY FROM” .1
CLOSED VERSUS OPEN HORIZONTAL VERTICAL
UNDER DECK
FORE AND AFT No Restriction One on top of closed permitted

Otherwise

NOT in the same vertical line
ATHWARTSHIPS No Restriction

1 – Situation closed versus open – UNDER DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

“AWAY FROM” .1
OPEN VERSUS OPEN HORIZONTAL VERTICAL
ON DECK
FORE AND AFT One container space NOT in the same vertical line
ATHWARTSHIPS One container space

1 Situation open versus open ON DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

“AWAY FROM” .1
OPEN VERSUS OPEN HORIZONTAL VERTICAL
UNDER DECK
FORE AND AFT One container space or one bulkhead NOT in the same vertical line
ATHWARTSHIPS One container space

1 Situation open versus open UNDER DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

“SEPARATED FROM” .2
CLOSED VERSUS CLOSED HORIZONTAL VERTICAL
ON DECK
FORE AND AFT One container space NOT in the same vertical line
ATHWARTSHIPS One container space

2 – Situation closed versus closed – ON DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

“SEPARATED FROM” .2
CLOSED VERSUS CLOSED HORIZONTAL VERTICAL
UNDER DECK
FORE AND AFT One container space or one bulkhead NOT in the same vertical line
ATHWARTSHIPS One container space

2 Situation closed versus closed UNDER DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

“SEPARATED FROM” .2
CLOSED VERSUS OPEN HORIZONTAL VERTICAL
ON DECK
FORE AND AFT One container space NOT in the same vertical line
ATHWARTSHIPS Two container spaces

2 Situation closed versus open ON DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

“SEPARATED FROM” .2
CLOSED VERSUS OPEN HORIZONTAL VERTICAL
UNDER DECK
FORE AND AFT One container space or one bulkhead NOT in the same vertical line
ATHWARTSHIPS Two container spaces

2 Situation closed versus open UNDER DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

“SEPARATED FROM” .2
OPEN VERSUS OPEN HORIZONTAL VERTICAL
ON DECK
FORE AND AFT One container space and not in or above same hold NOT in the same vertical line
ATHWARTSHIPS Two container spaces and not in or above same hold

2 Situation open versus open ON DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

“SEPARATED FROM” .2
OPEN VERSUS OPEN HORIZONTAL VERTICAL
UNDER DECK
FORE AND AFT One bulkhead NOT in the same vertical line
ATHWARTSHIPS One bulkhead

2 Situation open versus open UNDER DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

"SEPARATED BY A COMPLETE COMPARTMENT OR HOLD FROM" .3
CLOSED VERSUS CLOSED HORIZONTAL VERTICAL
ON DECK
FORE AND AFT One container space and not in or above same hold NOT in the same vertical line
ATHWARTSHIPS Two container spaces and not above same hold

3 Situation closed versus closed ON DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

"SEPARATED BY A COMPLETE COMPARTMENT OR HOLD FROM" .3
CLOSED VERSUS CLOSED HORIZONTAL VERTICAL
UNDER DECK
FORE AND AFT One bulkhead NOT in the same vertical line
ATHWARTSHIPS One bulkhead

3 Situation closed versus closed UNDER DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

"SEPARATED BY A COMPLETE COMPARTMENT OR HOLD FROM" .3
CLOSED VERSUS OPEN HORIZONTAL VERTICAL
ON DECK
FORE AND AFT One container space and not in or above same hold NOT in the same vertical line
ATHWARTSHIPS Two container spaces and not above same hold

3 Situation closed versus open ON DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

"SEPARATED BY A COMPLETE COMPARTMENT OR HOLD FROM" .3
CLOSED VERSUS OPEN HORIZONTAL VERTICAL
UNDER DECK
FORE AND AFT One bulkhead NOT in the same vertical line
ATHWARTSHIPS One bulkhead

3 Situation closed versus open UNDER DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

"SEPARATED BY A COMPLETE COMPARTMENT OR HOLD FROM" .3
OPEN VERSUS OPEN HORIZONTAL VERTICAL
ON DECK
FORE AND AFT Two container spaces and not in or above same hold NOT in the same vertical line
ATHWARTSHIPS Three container spaces and not above same hold

3 Situation Open versus Open ON DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

"SEPARATED BY A COMPLETE COMPARTMENT OR HOLD FROM" .3
OPEN VERSUS OPEN HORIZONTAL VERTICAL
UNDER DECK
FORE AND AFT Two bulkheads NOT in the same vertical line
ATHWARTSHIPS Two bulkheads

3 Situation open versus open UNDER DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

"SEPARATED LONGITUDINALLY BY AN INTERVENING COMPLETE COMPARTMENT OR HOLD FROM" .4
CLOSED VERSUS CLOSED HORIZONTAL VERTICAL
ON DECK
FORE AND AFT Minimum horizontal distance of
24 metres and not in or above
same hold 		Prohibited
ATHWARTSHIPS Prohibited

4 Situation closed versus closed ON DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

"SEPARATED LONGITUDINALLY BY AN INTERVENING COMPLETE COMPARTMENT OR HOLD FROM" .4
CLOSED VERSUS CLOSED HORIZONTAL VERTICAL
UNDER DECK
FORE AND AFT One bulkhead and minimum horizontal distance of 24 metresfootnote Prohibited
ATHWARTSHIPS Prohibited

4 Situation closed versus closed UNDER DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

"SEPARATED LONGITUDINALLY BY AN INTERVENING COMPLETE COMPARTMENT OR HOLD FROM" .4
CLOSED VERSUS OPEN
OR
OPEN VERSUS OPEN 		HORIZONTAL VERTICAL
ON DECK
FORE AND AFT Minimum horizontal distance of 24 metres and not above same hold Prohibited
ATHWARTSHIPS Prohibited

4 – Situations closed versus open and open versus open – ON DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

"SEPARATED LONGITUDINALLY BY AN INTERVENING COMPLETE COMPARTMENT OR HOLD FROM" .4
CLOSED VERSUS OPEN
OR
OPEN VERSUS OPEN 		HORIZONTAL VERTICAL
UNDER DECK
FORE AND AFT Two bulkheads Prohibited
ATHWARTSHIPS Prohibited

4 Situations closed versus open and open versus open UNDER DECK

Note All bulkheads and decks shall be resistant to fire and liquids.

Parent topic: Annex – Illustrations of Segregation of Cargo Transport Units on Board Containerships and Ro-Ro Ships
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