He said such networks serve as critical links between illegal refining camps and end users.
The NPA said the vessels are expected between June 8 and June 13.
The 42 additional ships are expected at Lagos ports between Friday and Tuesday, June 9.
According to him, the suspects fled on sighting naval personnel.
Eight out of the 29 ships will discharge petrol, diesel, bulk gas and aviation fuel.
NPA says 36 ships with petroleum products, food items and other goods are expected at Apapa, Lekki Deep Sea Port and Tincan Island Port in Lagos on Tuesday.
The operations were conducted by the 6 Division in collaboration with other security agencies over a 25-day period.
He said frequent outages force manufacturers to depend on diesel generators, undermining efficiency.
The imported goods included bulk gypsum, soybeans, aviation fuel, diesel, fuel oil, petrol, gasoline, general cargoes and bulk sugar.
The Nigerian Navy has intercepted about 44,000 litres of suspected illegally refined petroleum products and arrested eight suspects in Rivers.
