> For the complete documentation index, see [llms.txt](https://docs.ceruleansonar.com/c/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ceruleansonar.com/c/rov-locator/rovl-mounting-and-wiring/simple-topside-deployment-fixture.md).

# Simple Topside Deployment Fixture

A 3D Printable mount by Tony White is available [here](https://www.printables.com/model/791756-cerulean-rovl-receiver-hanging-mount)

<figure><img src="/files/LsnGtNyk5uvPyDGh4bEu" alt=""><figcaption></figcaption></figure>

Here's another alternative that doesn't require 3D printing:

{% hint style="info" %}
Note: We DO NOT recommend using the ROVL electrical cable by itself as a handle or as a deployment apparatus!
{% endhint %}

The figures below show a simple fixture for deploying a topside unit (either transmitter or receiver). The chain, pipe and weights keep the unit submerged and somewhat vertical even if the boat is drifting. ***Once the IMU is calibrated*** (receiver only), just drop the unit into the water. The chain should be long enough to let the unit be 1+ meters deep (deeper is better). Obviously, the electrical connections at the user end of the cable need to be kept dry.

The fixture uses US 1-inch size PVC pipe and fittings.

![Receiver/Transceiver Fixture. The carabiner at the top end of the chain can be used to affix the chain to a railing or other secure point. It makes for a sad day if you drop your receiver in and aren’t holding onto the chain tightly enough. Be sure to use stainless steel hose clamps with stainless steel screws.](/files/iA4ZDIJMPP9VG0vOxQ8y)

![A 1-inch union fitting should be sawn so a hose clamp can clamp to the ROVL unit. The pipe end of the union can be glued to the pipe or another slot can be sawn to allow a hose clamp to hold it to the pipe. If a wide slot is cut into the ROVL end, the ROVL cable can route out the slot for quick attachment and removal (see next photo).](/files/FipdyF7vVfJaa8dEoHkP)

![Showing the ROVL cable routed out a wide slot in the union.](/files/vaYYrSOICDZ7lb6P6v89)

![Cutting the upper end of the pipe at an angle makes it easier to run the ROVL cable through the middle of the pipe, especially if a USB adapter is molded into the cable.](/files/MLlayaJmqisTW4f6K6pJ)

![ROV ballast weights hold the unit underwater and vertical even if the boat is drifting. We use four weights.](/files/xB0HqLP4yRQt6B0NVUZs)

![Mk II receiver on a chain fixture, ready to drop into the water.](/files/5kgA11fyqdx1XJ6iPx77)