In what promises to be a decisive weekend of the fall intercollegiate sailing season, the Harvard Sailing Club will be out to repair damage done by recent losses to Brown and Princeton.

A first place in either the New England sloop championships today or the 38th Greater Boston Dinghy Championships tomorrow could restore the Crimson to the leading position it held only three weeks ago.

In the sloop trials, the Crimson has a slight edge over Holy Cross, Middlebury, Tufts, and most other entrants, but may have a hard time getting the best of the Coast Guard. The Cadets' drop to fourth place in last Sunday's preliminary on the Charles River Basin augurs well for Crimson success, however.

The real test will come tomorrow, when some of the best college helmsmen in Massachusetts compete for the 38th Greater Boston Dinghy Championship. Since M.I.T.'s top skippers will be in Kings Point for the Nevins Trophy, B.U.'s favored team should present the only very formidable opposition.

But they may well be enough, for Terrier skippers Dick Cook and John Buckingham, with help from sophomore stand-out Larry Fudge, have the potential to put B.U. on top.

The Crimson will be counting heavily on Commodore Parker to finish well. If he does, good support from Carlos Rodriguez and Tom Munnell might enable Harvard to take the day from B.U.

No matter what happens, it won't be a dull weekend for the Crimson skippers. And stiff competition may even bring out the club's best showing so far.