Nova Scotia RCMP issued a warning to pleasure boat operators today - stay out of the Swiss Air exclusion zone at the mouth of St. Margaret's Bay.

Searchers are still looking for debris to help determine the cause of the crash of Swiss Air Flight 1-11 which went down last September.

RCMP officers say the area is well marked and people should have no trouble navigating around it. Each corner of the zone is marked with yellow buoys and can be picked up on radar.

However, last weekend five pleasure boats wandered into the 40 square kilometre zone. 85 percent of Swiss Air 1-11 has been recovered from the ocean bottom.

But Transportation Safety Board officials are still searching for more debris. In fact only a couple of days ago wiring was found that some officials are calling crucial to the accident investigation.