My d's best friend goes to University of North Florida. She came in as a freshman in the fall with 6 hours of AP credit. She's being told that she must do all 9 hours of the summer requirement because they do not accept partial AP credit below 9 hours..
With a ground clearance of 48 cm (18 in.), the Abrams tank can climb over obstacles that are 1.07 meters (3.5 feet.) high and 2.74 meters (9 feet) wide. They can ford rivers up to 1.22 meters (4 feet) deep without preparation , and up to 1.98 meters (6.5 feet) deep with the use of a fording kit. The new T-158 tank track has a longer life span than earlier track, and the removable rubber pads make it more cost effective.
If you tank is more than 18-20 (46-51cm) tall, you will need to get a special deep water air pump designed to push air that far below the water surface. The more resistance the things you are pushing air through have to the air, the larger an air pump you will need.