The motif in question appears within the first thirty seconds of the 'Navajo Dawn' track. Incidentally, this motif is not in fact original to The Perfect Storm. If you listen to Rachel Portman's score to The Legend Of Bagger Vance, the theme that can be heard during the scene in which Matt Damon contemplates the final hole in the climactic golf game at the end of the film, is in fact the same, with only the orchestration being different (Portman's orchestration involves the woodwind section of the orchestra supporting the strings, whereas Horner's orchestration employs strings only). Whether the theme is from The Perfect Storm or The Legend Of Bagger Vance is probably impossible to tell, owing to both movies being released concurrently. However, owing to James Horner's reputation for plagiarism (until recently he only 'borrowed' from himself, but his Enemy At The Gates score was centred around John Williams' Schindler's List theme), you will probably find that this theme was originally composed for The Legend Of Bagger Vance and that Horner stole it for use in the score for The Perfect Storm.