RedactedNarrative: According to a Coast Guard report, a Coast Guard vessel was towing a recreational sailboat to a restaurant dock on Lake Pontchartrain under stern tow when the latter vessel starting to take on water due to deteriorating weather conditions.  The Coast Guard vessel attempted to switch towing configuration and while doing so accidentally hit the tow line, disabling their vessel.  Together, the vessels drifted into bridge pilings.  The sailboat sank and the coast Guard vessel suffered damaged to its superstructure and windows.  Total damage was estimated at $75k, which has been broken evenly between the two vessels in this report since limited information is available.