That's how they've been catching em for years. Hemingway used to love doing this. In fact, some big money people over the years have sent up planes and helicopters to spot the schools and alert the boat as to where they are at. I have some video somewhere at home from the 1960s showing how they nail bluefins near Bimini as they come up the Old Bahama Channel and stray into the bank. In all my years of fishing the Bahamas, I have never tried it.
But yeah, what a rush to be just off Gun Cay and hook one up.
J