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“The build period has changed quite dramatically,” Finn acknowledged.

Photo by Darryl Dyck/Canadian Press

At one point, the first ship was supposed to arrive in 2012. That date has changed a number of times with the government later hoping for a 2018 delivery and then a 2019 arrival for the first vessel.

DND is now hoping for the delivery of the first ship in 2022 or 2023. Construction of some initial portions of the vessels will begin at Seaspan Shipyards in Vancouver this summer, Finn said, which it hopes will head off any potential layoffs of skilled employees at the shipyard.

Finn said the new costing model for the JSS is more akin to the one used by the parliamentary budget office. That office had an even higher estimate for JSS when it concluded in 2013 that the final tally for taxpayers would be $4.13 billion.

The Joint Support Ships are seen as being critical for the navy, as they will provide fuel and supplies for warships at sea.

The navy retired its last two aging supply ships years ago, one after being damaged beyond repair in a fire, the other because of excessive corrosion. After their retirement the Canadian military had been relying on the Spanish and Chilean navies to provide it with supply vessels for short periods of time.

Because of the delays to the JSS program, the previous Conservative government entered into agreement with Davie Shipyards in Quebec to lease a commercial vessel converted into a supply ship. That ship, the MV Asterix, is at the heart of the federal government’s case against Vice-Admiral Mark Norman.