President Ronald Reagan's barge, flanked by security vessels, leads other boats in his party through the Grand Canal. The barge is on loan from the commander of Carrier Group 8 while the president is attending the seven-nation economic summit. Other boats in his party are from the amphibious transport dock USS NASHVILLE (LPD 13), the amphibious assault ship USS INCHON (LPH 12), the dock landing ship USS WHIDBEY ISLAND (LSD 41) and the commander, Fleet Air, Mediterranean