RedactedNarrative: Subject advised me that he was operating his vessel westbound across the river north of Pea Patch Island when he struck the submerged rock jetty. Subject''s vessel was disabled in the accident and Subject believed he was taking on water. Subject''s outboard engine was raised up and I could see that the propeller had been sheared off as a result of the collision with the submerged jetty. Myself and Lt. towed the vessel with the 3 passengers aboard to Delaware City. While en route to Delaware City with Subject''s vessel in tow, I asked Subject if he was using any navigation chart or chart plotter. Subject said he did not have any charts. I asked Subject if he saw the white diamond channel markers indicating a submerged obstruction in the water. Subject said that he saw the white diamond marker in the water.