The Duck Boat had engine trouble, they shut the motor down, dropped anchor, and called the company to get a tow.
No reports yet if they called a Pan-Pan on 16, but if they did the tug and barge would have been alerted.
On the Delaware you will usualy have about 15 to 20 mins between seeing a barge and being in trouble, assuming you keep a good watch.
Sailing the Delaware will require frequent crossing of the shipping channel. If I don't have wind and current in my favour I will delay a crossing until I am confident it is clear or will have the motor on idle in neutral, and have the VHF on 16 with maximum volumn.
Had a great slalom run nun's to can's Philadelphia Airport to Chester yesterday without any barges, but still kept a good watch with frequent looks over my shoulder and the VHF on 16 at max volumn.
The Duck Boat water tour is all in the shipping channel, I suspect the investigation will center on communication issues.
1970 Havsfidra 20 by Fisksatra
On the Delaware River at Fox Grove Marina Essington PA