* Do not feed or throw any rubbish near marine mammals.
* Avoid sudden or repeated changes in speed or direction of any vessel or aircraft near a marine mammal.
*There should be no more than three vessels and/or aircraft within 300 metres of any marine mammal.
* Ensure that you travel no faster than idle or "no wake" speed within 300 metres of any marine mammal.
* Approach whales and dolphins from behind and to the side.
* Do not circle them, obstruct their path or cut through any group.
* Keep at least 50 metres from whales (or 200 metres from any whale mother and calf or calves).
* Swimming with whales is not permitted.
Anybody who spots whales off the Northland coast can contact Dr Visser through 0800 SEE ORCA.