Possible Clues:

• Run ---, become beached
• Stranded silver ring
• Silver circlet found on the rocks
• The vessel won't go if it's so ago, perhaps
• Perhaps a go, in short, on the bottom
• A go, perhaps, when it's no go for the ship
• A go, perhaps, when it's no go for the vessel
• Long ago, perhaps, stuck on the bottom
• (Ship) unable to float
• Ago, perhaps, when for the ship it's no go