Airmen from soon-to-be disbanded RAF Leuchars travelled to the Olympia centre, Dundee, to train for emergency ditchings - booking two lanes at the new £33 million pool.
Four lanes of leisure swimmers looked on as the pilots started jumping into the water in full kit, including boots and flying suits, while strapped into ejector seats.
They were then dragged down into the water before transforming their seats into life rafts and climbing in.
One swimmer said: "I was just getting started in the pool when a lifeguard asked me to shift into the next lane as the RAF had two lanes booked.
"Next thing I knew, they were bringing in all kinds of equipment. Then about half a dozen got suited up in flight suits and were strapped on to devices that looked like booster seats attached to frames that, presumably, would be linked to parachutes.
'Then they were shoved backwards into the water, with the life jackets springing into action.
"The little seats then turned into blow-up life rafts, which the lads had to build up and climb into.
"There they were, floating down the pool in these life rafts, wearing full military equipment, while I trundled along doing my lunchtime lengths."