Silversea Cruises has increased a fundraising effort that is now seeking to grab $550m in a bond sale, Moody's Investor Service said Friday.

The credit ratings agency also announced that it hiked its rating of the Monaco-headquartered cruiseship owner as a result of positive changes to its capital structure.

Moody's said that Silversea is increasing its senior secured notes sale from the original $275m, with the added proceeds aimed at at refinancing a loan for the 596-berth Silver Muse.

Capital