 To assist in transporting the Commandos , 12 motor launches ( ML ) were assigned from the 20th and 28th Motor Launch flotillas . These boats were re @-@ armed with two Oerlikon 20 mm guns mounted forward and aft to complement their twin Lewis guns . At the last minute another four MLs were assigned from the 7th Motor Launch flotilla ( see Footnotes for flotilla details ) . These four boats were also armed with two torpedoes each . Instead of transporting the Commandos , these boats were to engage any German shipping found in the estuary . All the MLs had a 500 @-@ gallon auxiliary fuel tank fixed to the upper deck to increase their range . The S class submarine HMS Sturgeon would leave before the rest of the convoy and be in position to act as a navigational beacon to guide the convoy into the Loire estuary . 
 To assist in transporting the Commandos , 12 motor launches ( ML ) <a href='uninflect' title='1'><mark>were</mark></a> assigned from the 20th and 28th Motor Launch flotillas . These boats <a href='uninflect' title='2'><mark>were</mark></a> re @-@ armed with two Oerlikon 20 mm guns mounted forward and aft to complement their twin Lewis guns . At the last minute another four MLs <a href='uninflect' title='3'><mark>were</mark></a> assigned from the 7th Motor Launch flotilla ( see Footnotes for flotilla details ) . These four boats <a href='uninflect' title='4'><mark>were</mark></a> also armed with two torpedoes each . Instead of transporting the Commandos , these boats <a href='uninflect' title='5'><mark>were</mark></a> to engage any German shipping found in the estuary . All the MLs had a 500 @-@ gallon auxiliary fuel tank fixed to the upper deck to increase their range . The S class submarine HMS Sturgeon would leave before the rest of the convoy and be in position to act as a navigational beacon to guide the convoy into the Loire estuary . 
To assist in transporting da Commandos , 12 motor launches ( ML ) was assigned from the 20th and 28th Motor Launch flotillas . These boats was re @-@ armed w/ two Oerlikon 20 mm guns mounted forward and aft to complement their twin Lewis guns . At tdalast minute anotha 4 MLs was assigned from thdath Motor Launch flotilla ( see Footnotes for flotilla details ) . These fou4ats was also armed with two torpedoes each . Instead of transporting thedammandos , dese boats was to engage any German shipping found in the estuary . alll the MLs had a 500 @-@ gallon auxiliary fuel tank fixed to the upper deck to increase their range . The dalass submarine HMS Sturgeon would leave before the rda of the coday and be in position to act as a navigational beacon to guide the convoy into the Loidaestuary .