Augmented Reality with FLIRONE

Augmented Reality with FLIR ONE

MORNING_CALM_BB_AR_FLIR_IOSPocket Mariner collaborated with Practical Boat Owner to successfully complete a demanding night time sea trial of our popular marine navigation apps, SeaNav HD and Boat Beacon with the  FLIR ONE Thermal Imager for iOS; a new, low cost , infra-red thermal imaging camera for the iPhone.  The FLIR ONE makes thermal imaging affordable and accessible to a much wider audience at a fraction of the cost of the higher end marine IR imaging devices. Pocket Mariner have ingeniously integrated the live thermal image with their widely acclaimed iOS Augmented Reality mode providing identification, distance and bearing of the ships and Aids To Navigation in view at night and in fog.  We wanted to see how well and how far off we could spot ships via their infra-red signature and if the FLIR ONE could help with searching for a Man Overboard (MOB).

Practical Boat Owner, the UK’s leading boating magazine, bravely deployed their editors, David Pugh and Ben Meakin, together with Ben’s Impala 28 yacht , “Polly” and intrepid “Woman Overboard” volunteer, Laura, along with Pocket Mariner’s CEO, Steve, on a pitch black night in Southampton water.

Here’s what we saw.

Continue reading “Augmented Reality with FLIRONE”

Quark-Elec AIS receiver review and Boat Beacon

For inshore (less than 10NM from the coast) our real-time internet AIS service for Boat Beacon and SeaNav has a lot of advantages over VHF AIS receivers and reception, it is very cheap, easy to install (no aerial required), easy to use and provides incredible range including “seeing” round corners and over headlands and islands. However if you venture further afield and go out of range of internet coverage, for instance when half way across the English channel between Southampton and Cherbourg and in the main shipping channel you need a VHF AIS receiver!

Many of our Boat Beacon and SeaNav users use our apps both for internet AIS and as a display and CPA alert device for their on-board VHF AIS receiver. There is a new and relatively inexpensive range of AIS receivers out on the market from Quark-Elec and also the dAISy. They are less than a quarter of the price of the usual AIS receivers from the likes of Digital Yacht, Comar and Weatherdock etc. . We wanted to try them out for use with SeaNav and Boat Beacon on iPad and iPhone.

iOS does not support USB connections so to get local AIS data into your iPad you need to connect via Wifi and will need an AIS receiver with Wifi built in or get a USB to Wifi adaptor. There are no USB to to wifi adaptors available on the market! It is possible to build your own for around £50 using a Raspberry Pi or BeagleBone Black as we have done but for this comparison this rules out USB only AIS receivers such as the dAISy unfortunately.

We drove out to nearby Dial hill in Clevedon overlooking the Bristol Channel at a height of approximately 100m above sea level. At this height the VHF horizon should be around 32NM for spotting ships. We used a standard marine 1/4 wave whip  AIS aerial (£50) on a tripod and our SeaNav app on a laptop in the car to run a comparison test to see how the Quark-elec compared to the Digital Yacht AIS receivers that we normally use.

ais_tests

and the view

IMG_1487

First off the devices:-

The dual channel Digital Yacht AIS wireless receiver at around £365.  http://www.cactusnav.com/digital-yacht-iais-wireless-receiver-p-11569.html. This also allows you to attach other NMEA data such as wind, speed and depth etc. to your iPad via the Wifi channel.

iais web
The Quark-elec A026 Wifi enabled AIS and GPS receiver at £94.79 . http://quark-elec.com/products/marine/147-qk-a026

A026_System_diagram

This looks like an amazing device as it also includes a GPS receiver and a NMEA multiplexer so you can combine data from Wind instruments, Speed log and Depth over Wifi too. You can get one without GPS for £79 – the QKA-024. So price for price this is less than a quarter of the price of the Digital Yacht equivalent!

The results

Quark-elec A-026

QuarkA026Screen Shot 2017-05-06 at 11.06.38

Digital Yacht iAIS

(note all the ships around Hinkley point near Burnham-on-Sea to the south, busy helping with the build of the new Nuclear reactor there).

DYScreen Shot 2017-05-06 at 11.01.47

The Quark picked up ships out to around 20NM from our location. It did not pick up the weaker Class B transmissions  from about 11NM away (purple boat in Cardiff and orange boats in Barry and Hinkley point in the Digital Yacht screenshot). The Digital Yacht maximum range was 39NM just over the expected VHF horizon.

Conclusion

The DY device was far more sensitive than the Quark with nearly double the range for picking up large ships using Class A AIS (12.5W). Class B AIS is much lower power than the class A that ships use and at only 2.5W has a maximum power limited range of around 8-10NM which appeared to be within the Digital Yacht’s capabilities but just beyond the Quark’s.

If you are on a small boat and your AIS aerial is at most 10m above sea level the VHF ship spotting horizon range will be about 12NM (see note at end on calculating VHF horizon range). The Quark easily met that target for spotting ships. With the built in GPS version you can provide GPS to your Wifi only GPS too. The Quark-Elec A026 would be a great buy on that basis if you want to use it on your boat with SeaNav so you can pick up AIS when out of range of our live internet coverage, for instance when half way across the English channel between Southampton and Cherbourg.

By the way, you don’t have to buy and install an additional aerial to get VHF AIS on your boat, you can share your existing marine band VHF radio aerial via a lossless splitter like this one from Glomex:-http://www.marinesuperstore.com/marine-communication/vhf-antennas/glomex-ais-am-fm-splitter-ra201ais

At Pocket Mariner we are also interested in using AIS receivers for our real time global AIS shore based AIS network which we are continually growing, now picking up live positions from over 40,000 ships around the world at any one time with  several hundred AIS receivers and aerials. Although the price point of the Quark is tempting, when you factor in the costs of installing and connecting up an aerial, the 4 fold increase in coverage area the Digital Yacht devices give us wins for shore based AIS stations.

VHF Horizon

VHF travels in a straight line and its range is limited by the curvature of the earth. The higher the aerial is placed above sea level the further it will see. A simple rule of thumb for calculating the range of an aerial is the square root of its height above sea-level in feet in NMs. So an aerial at 25′ will have a range of 5NM. To get the range that you can pick up targets at you need to combine the range of your aerial and that of the target. So for aerials both at 25′ the range will be just over 10NM. If you prefer metric, take the square root of the height above sea level in meters and then double it to get range in NM. e.g. 9m gives approx 6NM range. An AIS aerial mounted at deck/guard rail  level will only see large ships to about 8NM out!

http://www.literasea.ca/radar-horizon.html

vhfhorizon

Marine Navigation with FLIRONE Augmented Reality

Augmented Reality with FLIR ONE

MORNING_CALM_BB_AR_FLIR_IOSPocket Mariner collaborated with Practical Boat Owner to successfully complete a demanding night time sea trial of our popular marine navigation apps, SeaNav HD and Boat Beacon with the  FLIR ONE Thermal Imager for iOS; a new, low cost , infra-red thermal imaging camera for the iPhone.  The FLIR ONE makes thermal imaging affordable and accessible to a much wider audience at a fraction of the cost of the higher end marine IR imaging devices. Pocket Mariner have ingeniously integrated the live thermal image with their widely acclaimed iOS Augmented Reality mode providing identification, distance and bearing of the ships and Aids To Navigation in view at night and in fog.  We wanted to see how well and how far off we could spot ships via their infra-red signature and if the FLIR ONE could help with searching for a Man Overboard (MOB).

Practical Boat Owner, the UK’s leading boating magazine, bravely deployed their editors, David Pugh and Ben Meakin, together with Ben’s Impala 28 yacht , “Polly” and intrepid “Woman Overboard” volunteer, Laura, along with Pocket Mariner’s CEO, Steve, on a pitch black night in Southampton water.

Here’s what we saw.

Continue reading “Marine Navigation with FLIRONE Augmented Reality”

Simple 3dB dipole VHF AIS Marine Aerial from co-ax cable

Here’s how we make an AIS tuned 3dB gain VHF aerial using RF-coax cable.
Buy a 5 or 10m length of  50 ohm RF coax cable with bnc connectors already attached – this makes two – http://www.amazon.co.uk/dp/B00JVUP0L4. Cut to required length. Strip back the outer coating at the cut end to a length of 44.4cm + 5cm to make a loop (1/4wave for AIS frequencies). Pull the inner core through the outer sheath and lay the outer sheath back along the length of the coax and trim to 44.4cm. I add a couple of cm to the length so I can bend the tip of the inner core back on itself to hook it over something. Make sure the length of the inner is 44.4cm excluding the looped over end. Cover in heat shrink wrap if you want to make it waterproof and you have a 3dB gain AIS Aerial.
There is a useful video here showing how to do it here :-
and a photo of a 5m long one we made earlier.
Screen Shot 2016-04-08 at 15.07.39

 

Here’s the live reception from one of these we made and hung up on a window in a friends apartment in Singapore

You could also go one step further and make a 6dB  collinear like this from Neil Arundale (I have made and used one of these too and it compared equally with a £120 commerical collinear).

I hope that this inspires someone. If you get connected up please consider sharing your AIS data with us. We can provide a dedicated port and web view like the one for Singapore above.
http://pocketmariner.com/ais-ship-tracking/cover-your-area/

ShipPlotter AIS sharing to Boat Beacon and Pocket Mariner

Its very easy to set up using the UDP/IP peer to peer sharing feature in ShipPlotter’s I/O settings. See screenshots below. Select enable in the UDP/IP peer-to-peer output, enter the IP address 54.204.25.151 and Remote Port number 5322 (see area circled in red).

ShipPlotterBoatBeacon

Click OK when finished. You will return to the main program window. Click on the “Start” button and you should then see your data on this web page:-

N.B. If you would like your own dedicated UDP port number and web view to share to please email us at support@pocketmariner.com