Warning: count(): Parameter must be an array or an object that implements Countable in /homepages/45/d34072225/htdocs/easyais/wp-content/plugins/q-and-a-focus-plus-faq/inc/functions.php on line 250
Reasons can be various.
Amongst other things, the reason could be that you are out of range of the receiving station of this web-services.
Also it could take some time to see all your data there, it is not 100 percent live!
To check if the other vessels receive your position, just ask them by your VHF radio.
This is the easiest and most effective way.