Navigation marker

[jono_howlett]

Came across this on you tube

https://www.youtube.com/watch?v=d99_h30swtM

I had never heard of them either and I'm pretty sure I've not seen one.

Anyone else know of other examples of them?


jono

 

[snowbird30ds]

Shotley marina has them on the east coast, very easy to use to line up with the dredged approach channel.

 

[IvorClarke]

You did ask for other examples and in a different life I was a commercial oilfield saturation diver and we used to be given Imogon levels to determine the angle from horizontal of an object that had been landed on the sea bed. The level was placed on a flat surface of the object and the diver would adjust the central knob of the level until the lines he could see in the centre part of the level were perfectly parallel to each other. It was so obvious when the lines were parallel that even I could get it perfect. Then either the diver or the head mounted TV would read off the angle. There was a Vernier type arrangement that gave an accuracy of 0.1 degree. I tried to buy one several years ago whilst working onshore for a diving contractor, but could not find a supplier. Wish I had one now as the were almost indestructible.

 

[forelle541]

I’m sure that the Inogon Nav light still works at Shotley.

 

[pvb]

Yes, the Inogon light is operational at Shotley. You'll also see Inogon lights used at most airports for aircraft docking.