Search found 243 matches

by knotman
Sat Feb 20, 2021 12:50 pm
Forum: General
Topic: Diffraction control breakwaters, Chesapeake Bay
Replies: 0
Views: 3245

Diffraction control breakwaters, Chesapeake Bay

Hi all....Waiting, waiting, waiting. Refresher: Diffraction refers to various phenomena that occur when a wave encounters an obstacle or opening. It is defined as the bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/apert...
by knotman
Wed Dec 16, 2020 9:29 pm
Forum: General
Topic: Amphidromic Points
Replies: 3
Views: 4020

Re: Amphidromic Points

Most interesting Dave and John. To visualise an amphidromic [node] point, just rock your Christmas GLASS OF WINE gently over and back. I suggest the first one :lol: . The amphidromic point is where there is no up/down movement at the glass EDGE, even though the sides are rocking up and down. Think s...
by knotman
Sat Jul 18, 2020 12:28 pm
Forum: General
Topic: Wo ist das U-Boot?
Replies: 0
Views: 4969

Wo ist das U-Boot?

Sea kayaker in close call with submarine : https://jonathantolhurst.com/2010/07/day-32-stranraer-to-ailsa-craig-to-kildonan/ Stena ferry in close call with submarine: https://www.bbc.com/news/uk-scotland-south-scotland-53415748. Never stop looking around at sea. Ever. Rubber neck a bonus. Sennen
by knotman
Sat May 23, 2020 1:44 pm
Forum: General
Topic: Narco sub = sea-kayak with big ideas
Replies: 0
Views: 5038

Narco sub = sea-kayak with big ideas

https://www.forbes.com/sites/hisutton/2 ... 49a7953e14.

VSV :lol:
Love the fibreglass patch :lol: Sennen
by knotman
Tue Feb 11, 2020 8:02 pm
Forum: General
Topic: High Tides in Venice
Replies: 9
Views: 10306

Re: High Tides in Venice

Is such an acqua bassa common? When was the latest important 'acqua bassa'?

Really low tides are not a common phenomenon: before the “acqua bassa” of December 2016, the latest recorded “acqua bassa” happened in 2008, 8 years before.

Knotman