I'm reading a cruising guide to the Queen Charlotte Islands, a remote and challenging area about 60 miles off the coast of British Columbia, in preparation for a trip next year. The author recommends testing all mooring buoys by backing down on them once you're tied up to make sure they will hold.This brought to mind a comment from a Canadian friend who sailed his 47 foot ketch to New Zealand and back. He said that he never used mooring buoys because he wasn't sure of their maintenance and didn't know whether a rusty link of a chain or faulty shackle was ready to give out. He said that he knew that his own ground tackle was in good shape.I've heard lots of stories of mooring buoys blown ashore in winter storms and have seen one or two on the beach or rocks.I'd be interested in any experiences others may have had with mooring buoy failures. Do you test a mooring buoy by backing down on it before entrusting the safety of ship and crew to it's security?Gary WyngardenS/V Wanderlust h37.5