Retired Navy helicopter pilot Lt. Paula Coughlin, right, a victim of military sexual assault, with Sen. Kirsten Gillibrand, D-N.Y., at a press conference on the subject in February. Mandel Ngan/AFP/Getty Images

The U.S. Navy said on Wednesday that 151 sailors had been disqualified from working as sexual assault counselors and other positions as the military tries to address a pandemic of sexual assault cases.

The sailors were disqualified mainly for lack of training after the Navy reviewed the records of about 20,000 personnel who were involved in some way with preventing sexual assault or helping survivors, said Navy spokesman Lt. Cmdr. Chris Servello.

News of the Navy action came just weeks after the Army said it had removed 588 people from positions of trust following a similar review of recruiters, drill sergeants, instructors, victim advocates and sexual assault response coordinators.

The reviews were ordered by Defense Secretary Chuck Hagel as the Pentagon struggles to deal with rising reports of sexual assault and a series of embarrassing sexual assault cases.

The number of reported sexual assaults has risen sharply in recent years, jumping from 3,374 in fiscal year 2012 to more than 5,000 in fiscal year 2013. It was impossible to determine whether the increase represented a rise in assaults, reports or both.

Many of the crimes still go unreported for fear of inaction or retribution against the victim. An annual Pentagon study published in May estimated there were 26,000 sex crimes in the military in 2012, ranging from rape to abusive sexual contact.

About 1 in 5 women soldiers currently reports having experienced sexual assault in the military, according to Service Women’s Action Network (SWAN), a national advocacy group against military sexual violence. Yet more than three-quarters of the victims do not report the crime, according to a study by the Department of Defense. Nearly 1 in 3 perpetrators convicted of sexual assault remains in the military, SWAN also found.

The Navy’s Servello said a lack of proper training underlies the disqualifications, most of which are temporary.

"The most prevalent reason that we found was that either they didn't have documented training or they had not completed the requisite training required for whatever position they were in," he said.

He said some of those disqualified could be reinstated after completing the appropriate training for the positions. Servello added that he was not aware of any people being disqualified over allegations of sexual misconduct.

The Army review also looked at 20,000 records to check the suitability of people for the positions, not to take punitive action, said Lt. Col. Alayne Conway, an Army spokeswoman. Of the 588, most were moved to other jobs and 79 are awaiting separation from the Army, she said.

"The Army continues to ensure that those in positions of personal trust have the right tools, skills and background needed to carry out their duties effectively," Conway said.

Al Jazeera and Reuters