The middle letters of yardstick is DST which stands for Depth, Speed & Temperature

The hull

Bought from eBay for 35 GBP. The hull is around 1 meter long.

Dual propellers

The boat will have two propellers to give it some speed.

Propellers blocks

I drilled slanting holes into two pieces of wood blocks to provide a firmer support to the hull.

Parallel shafts

The objective was to get the propeller shafts parallel.

Rudder blocks

The next objective was to drill two blocks for the stern rudders.


The propeller shafts were glued into the boat together with a placeholder for the depth sounder.

Depth Sounder

A large hole is drilled and the depth sounder fitted.


The underside of the boat shows the depth sounder hole in front of the propellers.


Two motors will be used to power the boat.

Speed Controller

The speed controller is the Profi HF 40 II.

NMEA 2000 Network

The backbone of the NMEA 2000 network with the two end connectors. The depth sounder uses the NMEA 2000 network to communicate. The components just push together and then screw tight.


The boat floats with 6 kg of weight. This is the estimated weight of the additional electronics.

Garmin GPS

The Garmin GPS is fitted to the NMEA 2000 network.

Actisense NGT-1

To be able to extract the data on the NMEA 2000 network I needed the Actisense NGT-1.

NMEA 2000 power supply

A 12v battery is connected to the NMEA 2000 network to power it. The example does not show the depth sounder but it is easy to add another T-connector to the backbone and connect the depth sounder to it.


Finally a Windows Tablet can be added to the NGT-1 to log the data.


The above electronics will be added to the depth sounder and radio control electronics.


Bulkheads are added to provide support to the deck.


The deck is added with a tower for the GPS.


The boat is taking latitute, longitude and depth measurements.


The boat motoring around a lake at 2 meters per second.