BEEKO cus they prob sent the colinist there to to find it wile they didnt know. they may of lost the signol from the jocky and they didnt have the grid ref for the ship till they found ripley as it was recored in the ships log,cus in aliens S I the jocky ship look a bit more batterd so it may have lost the signol, that what i think
BEEKO plus it was 57 years till they found ripley so yes i think they lost the signol,