Approach the ship on her port and proceed toward the bow till you see a green circle on the water. Move into the circle and adjust your speed to stay in it while it fills in to a solid green.
Don’t get sucked under or crushed.
Good luck.
I might have misunderstood. When you say you reached the ship in the Solent, do you mean you met the ship in the heavy sea, or that you reached the waypoint in the Solent?
If the latter, you should have been transported to the sea.