"They sent a piece of crap to sail," she said. "They inaugurated a submarine with a coat of paint and a flag in 2014, but without any equipment inside. The navy is to blame for its 15 years of abandonment."
Some relatives had become "aggressive" when they were informed, Leguizmon said, and were "breaking things" inside the base.
Balbi defended the delay amid a barrage of questions. He insisted the report from the US had only been "officially" received on Wednesday and the second from Austria — which offered more details on the source of the anomaly.
The "hydroacoustic anomaly" was recorded by hydrophones — listening posts scattered around the world's oceans capable of detecting underwater noise — and the material had to be collated, analysed and cross checked, the spokesman explained.
The ARA San Juan had previously reported a short-circuit in its batteries and been ordered to divert to the Mar del Plata naval base; the location of the purported explosion lies on the route it is likely to have taken. Balbi said an explosion inside the submarine could have caused it to implode, which could explain why no debris had been found in the area.
Family members have also rounded on authorities over what they say was the decrepit state of the submarine. Built in 1985, the German-made vessel was fully renovated in 2014, and the Argentine Government has dismissed complaints over its age, insisting it was well maintained.
But Leguizmon — a lawyer — alleged that the ARA San Juan had in fact suffered a serious fault in 2014, and that all of the crew and their families were well aware of the precarious conditions they were working in.
"My husband told me that they had a fault in 2014 and that it was serious, that is all. That it was serious and it generated a bit of tension and fear inside there."
She said crew regularly said of the submarine that "it is all held together with wire".