From Auburn and points north on the Maine Turnpike

Follow the Maine Turnpike South (Rt. 495 at Auburn)
Take Exit 9 onto Rt. 95, to Rt. 295 South, into Portland
Take Exit 7 off Rt. 295 onto Franklin St.
Follow Franklin St. over the hill to the last traffic light at the water
Turn right onto Commercial St. and continue through 2 traffic lights
Then, on the left, you will find Aqua Diving Academy between the Gulf of Maine Research Institute and Becky's Diner

From Biddeford, Old Orchard Beach and points south of Portland

Follow the Maine Turnpike north to Exit 7
Follow signs for Rt. 295 (first exit on the right)
Take Exit 4, Portland Waterfront
Cross the Veterans Memorial Bridge
Turn right onto Commercial St. (marked 1A, Waterfront, and Truck Route)
Follow Commercial St under the Casco Bay Bridge
Then, on the right, you will find Aqua Diving Academy just past a Circle K gas station on the left and Becky's Diner on the right

Follow Brighton Ave into Portland to the six corner intersection at the University of Southern Maine
Go straight through the traffic light, curving left onto Bedford St. (do no follow Brighton Ave., which bears to the right)
At the next traffic light, turn right onto Forest Ave.
Continue following the directions below as you pass under Rt. 295

Rt. 302 becomes Forest Avenue in Portland
Follow Forest Avenue under Rt. 295, staying to the right
At the first traffic light after Rt. 295, bear right onto State Street (Rts. 1 & 77)
Drive in the left lane over the hill
At the last traffic light before the Casco Bay Bridge, turn left onto York Street
Take the second right onto High Street
At the bottom of the hill, turn left onto Commercial Street
Aqua Diving Academy will be immediately on your right, just past Becky's Diner

Alternatively, you can find directions from anywhere using the map below.