TCP Connection Problems on Apple iOS 10


Since Apple’s release of iOS 10 for iPhones and iPads, we have been getting a number of calls and emails saying that various navigational Apps that read wireless NMEA data from our products have stopped working, including our free iAIS app.

There are two modes/protocols that our wireless NMEA products can work in; TCP which is a reliable one to one type connection supported by most apps and UDP which is a broadcast protocol that allows multiple devices to all receive the same data.

When we started to investigate, we found that TCP communication on all Apps no longer worked with iOS 10 and UDP only worked on some apps. At first we thought this might have been an Apple API type change that had caused the problem, but then we discovered that changing the IP address of our wireless NMEA products from to fixed the problem.

The IP address range is usually reserved for Ad-Hoc networks where there is no DHCP server and dates back to our first iAIS product (released in 2011) that only supported Ad-Hoc networks. With the release of Android, which did not support Ad-Hoc networks, we updated our wireless NMEA products to the more common Access Point mode but retained the IP address, to avoid changing too many Apps and Documentation.

Now it seems that Apple are clamping down on TCP connections on Ad-Hoc networks and this means that all customers who have updated their iPhone or iPad to iOS 10, will need to change the IP address of their wireless NMEA product, if they have one of our; iAIS, WLN10, WLN10HS, WLN20, NavLink, PilotLink or AIT3000 units. Please note that our iNavHub and Sonar Server products are not affected by the iOS change.

To make this procedure as easy and simple as possible, we have created a new Tech Note that explains what needs to be done. Click here to download.


Summer’s Here and the AquaWear WLN20 Gateway Gets Your Navigation On Deck

Summer is arriving and the last place you want to be stuck, figuring out your charts and navigation, is down below at the chart table or lower helm.  Here’s how the WLN20 NMEA-WiFi navigation server can enable next generation navigation and start to integrate your smart phone, tablet, PC or MAC into your boat’s navigation system.

aquawear dame


The WLN20 connects to your existing boat instruments, plotter and even an AIS thanks to its dual NMEA inputs.  It then creates a wireless hotspot on your boat so anybody with a smart phone or tablet can connect and gather real-time boat nav data to be displayed on a variety of low cost charting, instrument, AIS and boating apps.

Installation is simple – just connect using a simple 2 wire NMEA connection to existing products and you’ll upgrade your boat to next generation wireless navigation.  Multiple devices can also connect so your on board data can be shared with all your crew.


You can watch the video here to find out more

As a bonus, the WLN20 ships with a stylish wrist case allowing you to literally wear your smart phone on your sleeve – it’s amazingly practical – think of anchoring at the bow and being able to glance at the depth or trim sails while looking at VMG.  That’s why we call it AquaWear.  Of course, it’s not just limited to navigation data – there’s a mass of great charting apps that will turn your smart device into a sophisticated touch screen plotter including our own NavLink charting app for iOS.

For more information, check out our main website HERE

PS – If you’re away chartering on a boat with limited or unknown navigation gear this summer CHECK OUT our new portable navigation solution – SmarterTrack Express for a PC.  You can also download a demo of the software from HERE