RedactedNarrative: Vessel 1 was heading north thru collier bay and entered collier creek. Collier creek is a narrow channel with a lot of water running thru it now with a full moon and an outgoing tide. 
  
  As vessel 1 approached marco river the very strong current heading out from marco river and the strong current from collier creek met and caught vessel 1 in a spin pushing it onto the sand bar. Vessel 1 then started a slow spin and the bow caught the marker bending his bow rail and breaking the anchor block. I noticed a small puncture in the bow starboard side about the size of a quarter. Once vessel 1 finished its spin the captain was able to gain control and navigate to rose marine to wait for his insurance adjuster. This vessel is equipped with an 18 horsepower yanmar which pushes the sailboat at around 6 knots which is about the speed of the current this morning as it headed out, there was not enough power to control the vessel during these circumstances.
  