Diver Kent Ericksen inside Long Cave or better known as Matt's Crack .at the Poor Knights Islands Marine Reserve New Zealand.At the Poor Knights Islands Marine Reserve New Zealand..Monday 19 April 2010.Photograph Richard Robinson © 2010.Dive Number: 243.Boat: Mazurka..Site: MattÕs Crack, Poor Knights Marine Reserve, New Zealand..Temperature: 20.7 Degrees Celsius..Rebreather : Inspiration Vision. Total Time On Unit: 45:56 hh:mm.Maximum Depth: 15.7 meters..Bottom Time: 73 minutes..Bottom Time to Date: 13,488 minutes. .Cumulative Time: 13,561 minutes.