Strange that. If you have another Android device, I'd recommend installing the app mentioned here -
http://droidboxforums.com/threads/wifi-analyzer.83/ - on this second device and putting the phone/tablet in the same location as your T8. Make sure it can see the network. If it can, try TEMPORARILY disabling the WiFi security in your Marina's network hardware. See if the T8 can then connect. If it can, knock the security up one level (for example, use WEP (not secure, but useful to trace the issue)), if you can still re-connect (after entering the password on your T8) then go up one more level of security. If you find which type of security causes the issue, try an alternative (WPA2-PSK, shared keys, WPS PIN method of connecting) but as secure type of encryption.
It is probably obvious, but in case it hasn't occurred to you yet, it would also be worth rebooting the base station.