Marinetraffic data is quite expensive.
If you have interest then you can buy marinetraffic data for smaller area and build your own map with Windy API.

@xyw101
You are right, I did not notice this bug before.

Try to add polyfill to head:

script src https://cdn.polyfill.io/v2/polyfill.min.js

Works for me:
https://codepen.io/siim/full/JBBepy

@saaneuvos

I think you need to publish this page also.

At the moment it shows "Page not found" / "HUPS! ETSIMÄÄSI SIVUA EI LÖYTYNYT."

Just give us link and then it is easier to tell you what is wrong with it.

Try using left and right arrow keys on keyboard
Maybe it is something similar what you want to use

CTRL -+ not working is related to global keydown event listener usage.
https://community.windy.com/topic/6424/excessive-keydown-event-usage

Marinetraffic.com is only provider with decent world-wide coverage, but their API is really expensive.

Free providers don't have enough coverage to be useful. I doubt it is worth effort to add AIS data to Windy.com main app.

In my opinion Windy should stay focused on weather data.
Maybe users who want AIS data can asks Marinetraffic/Vesselfinder to use Windy API or write their own app with Windy API.

// I have used Marinetraffic API, it worked great for tracking boats near shore, but for 20 boat it was around 200EUR month. If Satellite AIS data is needed then price is much-much higher.

Remove:
window.WINDY_BOOT_RELATIVE=true;

At the moment there is keydown eventlistener for document.body.

Windy uses arrow keys and zoom keys with this eventlistener, but other keys are mostly ignored.

This makes impossible to change tabs using CTRL + number keys or using CTRL + F.

Both API v4 and Windy.com is affected.

Is it possible to not use preventDefault() for all keycodes or only use preventDefault() when windy div is focussed (tabindex)?