Thanks for your stories, all, they have been entertaining thus far.
The operation I worked for on Cayman Brac was serious about the "guide" role. My first couple weeks on the job were spent just learning the sites. Then they had me lead dives on the easy-to-navigate ones first such as wall dives and the Soviet-built Cuban frigate wreck, the M/V Capt. Keith Tibbetts. Then they trusted me to lead dives where more attention needed to be paid to pilotage or a compass might be required. We planned a couple of days each week where an experienced guide would be aboard so I could learn new sites until I was off the leash entirely. That impressed me. It takes about a month for a newly hired guide to settle into the role depending upon how many sites an operation visits. I'm glad our operation didn't just say, "Great! You have a DM or instructor card! The sea is right over there."
In the Bahamas, I was dating a woman who was an instructor. I'd spend weeks or months on the island at time. Just by going diving with the staff, I ended up earning my keep as a freebie by being voluntold to guide.
By the time I was asked if I wanted to work as a guide for an operation in Key Largo, I had a lot of experience diving there beginning as road trips in college and culminating with living in Miami with Key Largo just an hour down the road. I was working for Divers Direct and diving with a couple of operations as a freebie. I changed my work schedule to be in the store from 2 PM until 10:00 PM at night and I'd work as a guide for the two-tank morning dives. On days off, I taught my own students going out on our boat.
I never guided in North Carolina, but I taught a lot of wreck diving courses there until I shifted to the St. Lawrence River. Before I started working for a couple operations, I had a lot of experience and knew the sites quite well.
The only time I ever became lost that was entirely my fault was when we ventured down a slope off the stern of the Ash Island Barge to get 140 feet on the gauges for a tech class. When I swam back up the slope things didn't look right and the current was moving in the wrong direction. We all ended up becoming separated in the fast current and eddies. I lost a student teaching trimix trying to get to the wall to drift into the J.B. King. I told him to follow me and to swim hard to reach the wall before we hot dropped. I looked back and he was gone. He twisted his ankle when he did a stride off the boat in doubles and deco bottles. When he tried to keep up, he knew there was a problem and aborted without me seeing him.
I once got lost leading instructors and experienced divers in Dutch Springs after assuring them, I could take them exactly where they wanted to go. I failed miserably. A dive later with a cave diving buddy clued us into a problem. My compass was pointing north when we were heading south with the South Wall ahead of us. It turned out the compass had developed an oil leak and water was mixing in with the compass oil throwing it off. Solo diving in Canada one afternoon, my Shearwater's compass wasn't making any sense on my swim out to a wreck. When I calibrated it after a battery change, the digital compass left out a quadrant. I felt like Flight 19 in the Bermuda Triangle.