"We're exploring that possibility as we're very anxious to get back," says Ryan Harris, a senior underwater archeologist for Parks Canada.
Searchers discovered British explorer Sir John Franklin's reinforced 19th-century wooden warship in the Queen Maud Gulf in early September.
But winter was rapidly closing in across Nunavut, and after only 12 hours taking pictures and video of the sunken British vessel, underwater archeologists had to pack up and sail out of the Arctic before freeze-up.
The search team has every intention of going back to the site next summer — along with continuing the quest to find the other lost Franklin expedition ship, the HMS Terror.
But if there's a way to get back to Erebus sooner — and Harris certainly hopes there is — divers could be going through the ice next April in an attempt to unravel more of the mystery of what exactly happened to Franklin and his crew of 128 men as they tried to find the long-sought Northwest Passage.
"It's not something we routinely do," Harris says of what would be considered winter diving.
"It's not particularly complex, but it would mean that we'd be diving with surface-supplied diving equipment, not scuba, for safety."
They would also have to set up an ice camp and rely more on air support — whether it's helicopters or Twin Otters. And the Parks Canada team would likely be working more closely with divers from the Royal Canadian Navy.
Lots of expertise
While winter diving to explore a shipwreck is rare, it's not unprecedented.
Last spring, Jonathan Moore, one of the members of the Franklin search team, worked with the Navy at the Nunavut wreck site of the HMS Breadalbane.
That 19th-century merchant ship sank near Beechey Island in 1853 while trying to get supplies to others looking for Franklin and his lost expedition.
"The ice camp was set up by the navy, and their fleet diving unit deployed a remotely operated vehicle to get imagery and data on the Breadalbane at a depth of 90 metres, quite a challenging wreck site to work on, so yes, there's definitely precedent," Harris said.
"There's certainly a lot going on in the Canadian Arctic, and we have a lot of expertise that we can tap into."
One of the questions now is whether that technical expertise can tap into the kind of private-public sector partnership that helped find the Franklin ships.
"What makes it kind of difficult is the wreck is covered with a blanket of kelp.
"You have to be there firsthand to be able to poke in under the kelp fronds that cover the upper deck to be able to identify some features."
Still, what Harris has been able to see so far has left him spellbound by the potential to unravel some of the many questions that have hung over the ill-fated Franklin expedition since the mid-1800s.
"Every dive we made was just a discovery from beginning to end, and you could scarcely take it all in. Everywhere you looked there was something new and really quite remarkable."
Now, underwater archeologists are reviewing the hundreds of photographs and a couple hours of video they were able to take in September.
They are carefully plotting and planning their next moves in investigating what Harris describes as a "rather complex structure" that is overall "quite remarkably well-preserved."
One of the challenges is to determine how divers can get inside the wreck.
"A couple of us had the opportunity to drop down between the exposed deck beams and have a look around, but we weren't penetrating below the decks at all.
"We were just kind of having a look and that tells us there's a lot of room inside the forward half of the ship," says Harris.
"You could look forward and see the ship's galley stove. You could see the forward hatchway going down into the hold."
Among the questions, could Erebus reveal anything further about the fate of Franklin himself?
"You don't know at this point. The potential is almost limitless," says Harris, noting that preservation conditions on an Arctic shipwreck can be "astoundingly favourable to the survival of organic materials, even including paper."
Maybe there will be journals from crewmen, with handwritten accounts sealed up tight in a satchel.
Will there be human remains? (None have been spotted so far.)
Will there be anything that helps settle the questions around whether lead poisoning or botulism played a significant role in the sad demise of Franklin's men?
Will there be clues that reveal whether Erebus drifted on its own to where it was found, or whether it had been re-manned, after the ships that had been beset by ice for two years and abandoned in 1848 off King William Island?
Maybe there will be evidence that reveals what the men were trying to do if they did indeed re-man the ship and navigate it into the Queen Maud Gulf.
"Were they just trying to get closer to the mainland so they could proceed on foot? Did they still hold out a forlorn hope of one day navigating to the Beaufort Sea?" Harris wonders.
"Hopefully time will tell."