Angular size reduction & convergence, atmosphereic lensing, magnification & refraction and mirage obfuscation, the angle light enters the observers eye and its elevation as well as the objects elevation. All these things need to be considered when analyzing what happens to a visible object as it approaches the horizon and vanishing point on a flat plane.
In the case of an aircraft since it's above you it visually decends down to the horizion at eye level. With a boat below you it visually rises up to the horizon as it approaches the vanishing point. This is convergence in action.
Can you see the problem here with claiming the boat sailed up, over and behind a curve three miles out? Say the aircraft is a helicopter shadowing the boat at low altitude.
911: "Fire, police or ambulance?"
Vod: "Hello, Coast Guard please!"
CG: "go ahead caller"
Vod: "I just witnessed a helicopter travel straight down into the ocean three miles out."
Vod: "It was following a boat that went up and over the curve!"
Vod: "The helicopter just went straight down, my god the humanity!"
Great explanation. I will put 50 bucks up saying he doesn't get it and says something ridiculous in defense of his stupidity. To think, he actually doubled down and came back and said "You admitted you see planes disappear behind the horizon, which means the earth cannot be flat." is quite remarkable. He literally made my wife and son LOL with that. Neil Tyson Degrass and Joe Rogan are probably praying he shuts the hell up before even more people are converted.
Not sure you need much help here. You seem like Dubay part 2. I will stick around and ridicule and punk Vod till it gets boring and my son get's his fill of a brainwashed fool. He got a hell of a school lesson out of it.
I hope the Mounties didn't try to take the horses out into the ocean to help the victims. You never know with them boys from the north.
Vod it's ok to pick up a book and learn what your arguing about as not to make a fool of yourself. You can't defend science by not understanding basic science.