Retired admiral Marcelo Srur was handed "45 days of arrest" for having given an "incomplete" picture to the defense ministry of what happened to the submarine, thus "preventing the family members of the crew from being informed," said a statement by Argentina's war council.

Claudio Villamide, the former commander of the Submarine Force, was dismissed after he was found guilty of "lack of care and neglect of the troops and equipment under his charge."

The ARA San Juan sub disappeared in November 2017. When it was found just over a year later, it was at a depth of more than 900 meters in a desolate area of the South Atlantic some 400 kilometers off the coast of Argentina.

It had been crushed from an implosion caused apparently by a technical fault but authorities decided against attempting to refloat it.

Two active captains were given 20 and 30-day detentions while a former head of a naval base in the south of the country was given 15 days of arrest.

Two other people were acquitted.

Luis Tagliapietra, the father of one of the victims, welcomed the news but said the sanctions "came up short."

"There should have been other dismissals but in any case these sanctions are important because they are linked to the penal investigation," for which he is a plaintiff, Tagliapietra told AFP.

Last November, a court ordered an investigation to determine whether former president Mauricio Macri and his former defense minister Oscar Aguad should be held accountable for the accident.