The US Navy’s USS Toledo (SSN-769) submarine has arrived at the Norfolk Naval Shipyard (NNSY) for a scheduled engineered overhaul.

The vessel has arrived at the shipyard on 21 January.

It will undergo replacement, repair as well as overhaul of hardware and mechanical systems after an ‘early production period’ comprising advance planning, execution services and availability preparations for task.

The Naval Sea Systems Command estimated that around 437,000 workdays would be required for completion of the task.

The engineered overhaul of the submarine follows USS Newport News (SSN-750) and USS Albany (SSN-753).

Deputy Project Superintendent Chad Waldroup said: “With the Covid-19 pandemic, the project team worked through a plan to have a smaller team travel to the boat’s homeport in Groton, Connecticut and perform pre-arrival work to allow us to get into the major work quicker once the boat arrived.

“We have also worked with [NNSY’s Process Improvement division] Code 100PI on a number of Strategic Planning Session initiatives that will allow us to be successful.

“These initiatives range from buying new brows that improve the routing of services to looking at existing requirements to see if they can be improved upon.  We also set up a weekly meeting cadence with the ship to ensure they are well prepared on expectations and knowledge about the shipyard.”

According to Naval Sea Systems Command, the Toledo will first be pierside for an ‘extended period’ before leaving to the dry dock as the dry dock is currently undergoing maintenance to upgrade its caisson, flood wall and piping.

This maintenance of the dry dock is part of the larger Shipyard Infrastructure Optimisation Program (SIOP).

Shipyard commander captain Dianna Wolfson said: “America’s Shipyard extends a warm welcome to USS Toledo and a great job to the project team for working several important initiatives already to achieve a successful availability.”

In December 2012, General Dynamics (GD) Electric Boat secured a contract modification by the US Navy to carry out routine maintenance and modernisation work on USS Toledo.