Compensation of £36.5m is being offered by P&O Ferries to the 800 staff it sacked last week, with 40 employees in line for packets of more than £100,000.
In a statement, the company said the pay-outs would be linked to the period of service, and in some cases exceed £170,000.
A spokesman for Business Secretary Kwasi Kwarteng confirmed the government had received a letter from the firm in response to his questions about the shock move by the 5pm deadline on Tuesday, March 22.
The total value of the settlement is £36,541,648, P&O said. Employees are also being given support to find a new job at sea or onshore, while the company added that 575 of the 786 seafarers affected are in discussions to progress with the severance offers, the PA news agency reported.
A spokesperson for P&O Ferries said: "This has been an incredibly tough decision for the business: to make this choice or face taking the company into administration. This would have meant the loss of 3,000 jobs and the end of P&O Ferries.
"In making this hard choice, we have guaranteed the future viability of P&O Ferries, avoided large-scale and lengthy disruption, and secured Britain's trading capacity."
P&O said it is paying (subject to settlement agreement) 2.5 weeks' uncapped salary for each year employed rather than the statutory 1 or 1.5 weeks and up to 13 weeks' salary in lieu of notice.
There will also be 13 weeks' salary on top of this in absence of consultation; some employees are receiving 91 weeks' pay and the chance of new employment, said the company.
P&O chief executive Peter Hebblethwaite has been invited to attend an evidence session jointly held by the Commons Business, Energy and Industrial Strategy (BEIS) and Transport Committees on Thursday, March 24.
In a statement, the committee chairs Darren Jones and Huw Merriman said: "From P&O Ferries, our members want to know why this action has been taken and how it can be justified.
"From the government and its agencies, we want confirmation that our laws are not being broken and safety is not being compromised on our ships.
"This shocking story has raised questions about UK employment law, safety practices, the support of this business through a pandemic and the redress available.
"We intend to hear from the key players about what they are going to do that means these workers are not left high and dry."
