While windows are great for letting the light in, they mess with your signal by reflecting it. Especially Low-E (low-emissivity) windows. They have a metallic film to help with energy consumption. Therefore, they can block and reflect the signal more than a clear window.

Tinted glass is designed with specific materials to block out the light and often come in an array of colors. Similar to Low-E glass, they sometimes have a metallic film which interferes with specific radio signals.

1. Wi-Fi Signals: Wi-Fi uses radio waves to transmit data, typically on the 2.4 GHz and 5 GHz frequency bands.
   
2. Tinted UV Glass and Coatings: Tinted UV glass often has a metallic coating to block UV and infrared light, which helps reduce heat and glare. This metallic coating can also reflect or absorb radio waves, including Wi-Fi signals. Your boat may have tinted windows, try moving your router away from the tinted windows. 
   
3. Effect on Wi-Fi:
   
   • Reflection: The metallic coating can reflect Wi-Fi signals, preventing them from passing through the glass. This can reduce the signal strength in areas beyond the tinted glass.
   • Absorption: Some coatings can absorb the radio waves, weakening the signal as it passes through the glass.
     
4. Impact on Performance: If Wi-Fi signals are significantly weakened by tinted glass, you might experience slower speeds, reduced range, or even dropped connections in areas where the signal has to pass through the tinted glass.
   

Example: Imagine you have a Wi-Fi router in one room and a laptop in another room separated by a tinted glass window with a UV or metallic coating. The metallic coating can weaken the Wi-Fi signal passing through the window, resulting in a weaker connection and slower internet speeds on your laptop.

In summary, tinted glasses can interfere with Wi-Fi signals by reflecting or absorbing them. This can lead to weaker signals and poorer Wi-Fi performance in areas beyond the tinted glass.