The officer in charge of the Navy’s Pacific fleet is expected to step down this week following several high-profile incidents under his watch, including the separate crashes of two US destroyers that ultimately left 17 sailors dead, according to a report.

Vice Adm. Thomas Rowden, who heads Naval Surface Force Pacific, will submit his resignation ahead of a formal recommendation that he be relieved of command, according to DefenseNews.com.

Seven sailors were killed when the USS Fitzgerald ran into a container ship in a busy shipping lane in mid-June. And 10 more lost their lives aboard the USS McCain when it hit an oil tanker in late August.

Both ships are part of the Navy’s 7th Fleet, which patrols waters around the Korean peninsula, China and Russia.

The Navy found that sailors’ lapsed safety training and poor communication led to the tragedies. It disciplined several crew members and axed 7th Fleet commander Vice Adm. Joseph Aucoin.