Cargo Segregation under IMDG
Away from
May be carried in the same compartment or on deck provided a minimum horizontal separation of 3m projected vertically is maintained.
Separated from
Can be carried in the same compartment if the intervening deck is resistant to fire and liquids; otherwise separate holds. On deck, a horizontal separation of at least 6m.
Separated by a complete compartment or hold from
There must be either a vertical or longitudinal separation by a complete compartment or hold, and two bulkheads or decks resistant to fire and liquids. On deck – a horizontal separation of at least 12m even if one package is stowed below deck.
Separated longitudinally by an intervening complete compartment or hold from
A vertical separation is not allowed. The packages
must be horizontally separated by a complete
compartment. On deck a horizontal separation of
at least 24m is required and between an “on
deck” and “under deck” package, 24m + an intervening compartment.
Ref: Cargo work book by Capt Errol Fernandes , Mariners Circle Website & Splash Maritime Website