I started commercial guiding in 1971 at the tender age of 14 and spent many years in the Big Ditch. I stopped full time in the late '80's but never gave up the sticks completely. For the last decade I've been paddling a kayak instead but still row as well. I've even been known to guide a paddle raft on occasion (a poor combination of the two if you ask me... begin the flaming!). I've never heard a professional guide use the term "oaring". Except maybe the limey's but I think they were thinking of something else...
By the way, "loose", which rhymes with noose, means something is loose, as in not tied in, or "that boat is really loose on a wave".
Lose means to lose something, as in lost.
Which reminds me; why isn't phonetic spelled the way it sounds?