 Nyorai kupfuurira kweiyi ndima - Munhandare yeMozambique, basa guru rePortugal Navy raiva Lake Nyasa, mukuedza kudzivisa mauto eFRELIMO kubva kunzvimbo dzavo muTanzania uye kushanda pamwe neMauto eMalawi. Basa iri rakaitwa neNyasha Flotilla, ichishanda zvikuru kubva paMetangula naval base, uye nezvikamu zvema marines. Kugadzwa kweNyasha Flotilla kwakaitwa nekurongwa kwemabasa akaomarara ekufambisa ngarava gumi nembiri dzekufambisa uye dzekumhara kubva kuchiteshi chengarava cheNacala kuenda kuLake Nyasa, munzira yemakiromita mazana manomwe nemakumi mashanu nemakumi mashanu. Mukati mekushanda pamwe chete nomuvakidzani Malawi, Navy yePortugal yakabatanidzwa zvikuru mukurongwa kwemauto ayo ehondo, ichiendesa kwavari zvimwe zvezvikepe zveNyassa Flotilla. Mauto ehondo akaisawo pfungwa pakupazve mauto ePortugal anoshanda kuchamhembe kweMozambique, achivabatanidza, negungwa, nenzvimbo huru dzekutakura zvinhu muLourenço Marques neBeira. Nokutanga kuvakwa kweCahora Bassa Dam uye kupararira kwevarwi veFRELIMO kunharaunda yeTete, mukutanga kwema1970, Navy yakatungamira chikamu chekuedza kwayo kuRwizi rweZambezi. 