Photo: Flickr/Canadian Forces

The federal shipbuilding program has hit another setback, as government documents show more delays in the construction of the navy's new supply ships and the Canadian Coast Guard's highly anticipated polar icebreaker.

The delays, revealed in departmental reports recently tabled in the House of Commons, are expected to cost taxpayers as the navy and coast guard are forced to rely even more heavily on stop-gap measures to address their needs.

The two supply ships, which together will cost $2.6 billion, and the $1.3-billion polar icebreaker, dubbed the John G. Diefenbaker, are to be constructed one after the other in Vancouver by shipbuilding company Seaspan.

All three vessels are desperately needed as technical problems recently forced the navy's two existing supply ships into early retirement, while the coast guard's 50-year-old Louis St-Laurent heavy icebreaker was supposed to retire next year.

National Defence and the Department of Fisheries and Oceans reported last year that the first new supply ship would enter the water in 2020, while the Diefenbaker would arrive in 2021 or 2022.

But the departments' most recent timetable says construction of the first supply ship won't be finished until at least 2021, with completion of the Diefenbaker similarly delayed until 2022 or 2023.

When the federal government's $35-billion national shipbuilding plan, which includes construction of new Arctic patrol vessels and a fleet of warships in Halifax, was first announced in 2010, it was expected the supply ships and icebreaker would all be finished by 2018.

National Defence spokesman Evan Koronewski blamed "challenges associated with completing the detailed design and organizing the entire supply chain" for the delay in the supply ship schedule.

Those challenges were also responsible for pushing back construction of the Diefenbaker, as work on the icebreaker can't start until the supply ships are finished.

The federal government has already committed millions of dollars in recent years to extend the lives of the current icebreaker fleet.

But the new delays help explain why the coast guard started looking last month at whether it can lease between one and five icebreakers from the private sector for the foreseeable future.