INJUN
Petty Officer 1st Class
- Joined
- Apr 29, 2008
- Messages
- 358
A marina I know of (name excluded) told me how much it costs them to have their channel dredged from the river channel to their marina opening. The opening to the marina is a narrow railroad underpass with height and width restrictions. I was not surprised at the amount it costs them (alot) and the frequency they had to have it done (8+/- years).
To save them some money (it may come in handy down the road), I came up with the idea of using a sort of cort nozzle to drive the prop wash downward, thus scowering the bottom to keep their channel open. It could be mounted to the deck and pivoted over the stern.
I recall seeing something similar to my idea on one of those Discovery type TV shows, where this large boat (small ship), had 2 elbow shaped devices (about the diameter of a 55 gal. drum). These were lowered (pivoted) of the stern and secured so as to be place directly in the path of the 2 prop washes. This system was used to wash away the sand/silt from over a ship wreck to expose the treasure via the prop wash.
The marina's boat would obviously have to be anchored well and moved as it progresses. I do not know what type of utility boat they have at the yard, but I'd think that it would not matter. A barge would be ideal with spuds (vertical beam type anchoring devices).
The river is tidal, brackish water with about an average 2' distance between tides and is slow moving. I guess it is 300' to 500' of channel to the river channel.
I'd like to get your comments, ideas or maybe even something that is manufactured for this. I plan to draw up structural plans for them.
To save them some money (it may come in handy down the road), I came up with the idea of using a sort of cort nozzle to drive the prop wash downward, thus scowering the bottom to keep their channel open. It could be mounted to the deck and pivoted over the stern.
I recall seeing something similar to my idea on one of those Discovery type TV shows, where this large boat (small ship), had 2 elbow shaped devices (about the diameter of a 55 gal. drum). These were lowered (pivoted) of the stern and secured so as to be place directly in the path of the 2 prop washes. This system was used to wash away the sand/silt from over a ship wreck to expose the treasure via the prop wash.
The marina's boat would obviously have to be anchored well and moved as it progresses. I do not know what type of utility boat they have at the yard, but I'd think that it would not matter. A barge would be ideal with spuds (vertical beam type anchoring devices).
The river is tidal, brackish water with about an average 2' distance between tides and is slow moving. I guess it is 300' to 500' of channel to the river channel.
I'd like to get your comments, ideas or maybe even something that is manufactured for this. I plan to draw up structural plans for them.
