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.
In this underwater lift, the chamber was 80 ft long and 60 ft (18 m) deep and contained a completely enclosed wooden box big enough to take a barge. This box moved up and down in the 60 ft (18 m) deep pool of water. Apart from inevitable leakage, the water never left the chamber, and using the lock wasted no water.