RedactedNarrative: Operator #1 stated to the effect:  
  I was traveling southbound at approximately 10-15 knots.  I thought I was just inside the channel but I guess I was off a little.  I felt the vessel strike the bottom and I pulled the throttles back and turned the engines off.  As I drifted the tide turned my vessel around and I got bottomed out in the shallow water.  I opened the deck plate and saw the port rudder shaft had damaged the hull and water was coming inside the hull.
  
  Investigation revealed:
  Vessel #1 was traveling southbound in the Intra Coastal waterway near marker 252.  The tide was almost at dead low.  Vessel #1 navigated outside of the channel and grounded on hard sand in shallow water.  The grounding caused the port rudder shaft to be forced up through the hull of the vessel.  The rudder shaft punctured the hull of the vessel and compromised the integrity of the hull allowing sea water to enter the hull.  The vessel was grounded on the sandy bottom in about 1 foot of water as water entered into the hull.  TowBoat US arrived on scene and temporarily plugged the hole.  TowBoat US was able to use de-watering pumps and pumped water out of the hull of the vessel.  TowBoat US removed the vessel to Somers Point Marina.  Information for this report was compiled by the operator's statement and damage observed on scene.