RedactedNarrative: Vessel 1 was towing vessel 2 at mouth of Gulfport Harbor when Vessel 1 hit a submerged rock and his engine stalled.   Both vessels drifted aganist a rock jetti and grounded on the rocks.  Coast guard boat could not get to the vessels because of low tide.  All persons on both vessels was able to walk to shore.  Both vessels substained extreme hull damage and both was a total lost.  Vessel 1 damage was $22,000 and vessel 2 damage was $11,000.  There was no injuries reported from either vessel.   Vessels was retreived next day when tide came back in.