RSRD : traffic in the solomons

[dlsa]

Ahoy,

I am playing SH4 1.5, TMO + RSRD. Patrolling the solomons late 42. Contacts are really scarce. In two patrols have only found 3 military targets (destroyer task forces).
Checked out the sim files in the campaign directory with the mission editor, and on those files there isn't barely any traffic to the solomons.
Are all those sim files used by the game ?

Cheers