Dr Silvano Jung points ahead at the barnacle-encrusted metal objects lying in the shallow water.
"Out here we've got the wreck of a B-25 bomber," the marine archaeologist says, standing atop an exposed rock off the Darwin coast.
"You can see two engines out there and I'm just about to walk up to the wing."
It's the final resting place of the N5-140, a B-25 Mitchell bomber that was on its way to the north coast of Timor for an armed reconnaissance mission during World War II.
But shortly after take off from RAAF Base Darwin on April 5, 1943, the aircraft crashed, killing the two Australian and three Dutch airmen on board.
The wreckage, 800 metres off the coast of Nightcliff, is only visible during extremely low tides.
When the water drops to just 0.34 metres, it gives Dr Jung a chance to survey this important piece of military history.
"It's still quite well preserved," he says.
"If you scrape back some of the barnacles and crustaceans, the aluminium looks like it's been dropped there yesterday."
It's been 10 years since Dr Jung last visited the site, and this time he's come with a drone.
"It gives me the opportunity to take aerial photos of the site which is useful in monitoring it over the years," he says.
As Dr Jung records the GPS location of the wreckage, a local family exploring the rock pools at low tide approaches him.
They're unaware of the site's historic significance.
"We came across this a few years ago when we were just walking the reef at low tide and thought it was a boat," Simon Matthews says as his two young sons look on.
"And it wasn't till we met you guys and realised it was an old bomber."
The B-25 Mitchell Bomber is just one of the many submerged secrets that are revealed during extremely low tides in Darwin Harbour.
There's a ship that went down during Cyclone Tracy, a trawler that didn't survive wild storms and a Catalina flying boat that sank during World War II, among many others.
"And these sites are very important as part of our history and identity," Dr Jung says.