DESIGNATED SHIPPING AREAS (DSA)

All commercial vessels of LOA 50 metres or more,
all specialised product carriers, and such
vessels engaged in towing or pushing another
vessel where the total length of the tow exceeds
150 metres must navigate within the limits of
the Designated Shipping Area or the General Use
Zones of the Great Barrier Reef Marine Park. 
Penalties apply when operating outside these
areas without the written permission of the
Great Barrier Reef Marine Park Authority. For
details see Seafarers Handbook for Australian
Waters AHP 20 and Australia Pilot Vol III NP 15.