# 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)
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.](https://2180742755-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTLwTkS60mCJ7pYKVd2G5%2Fuploads%2Fpv5VXhr3zcA4SP2bEzjF%2Fimage.png?alt=media\&token=86e0b1fa-ca36-41c6-8b64-1141251ad9a3) ![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).](https://2180742755-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTLwTkS60mCJ7pYKVd2G5%2Fuploads%2FgGrd00vCDarqetUc2L6F%2Fimage.png?alt=media\&token=b44404f5-31a3-4114-a761-2120534b2870) ![Showing the ROVL cable routed out a wide slot in the union.](https://2180742755-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTLwTkS60mCJ7pYKVd2G5%2Fuploads%2Fqp2eO6NSDaiZ4rWxpLoG%2Fimage.png?alt=media\&token=64803858-cbc2-46b9-8585-0c2cbdbb00da) ![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.](https://2180742755-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTLwTkS60mCJ7pYKVd2G5%2Fuploads%2FEBnCAyiyyDdlPEsjXPvZ%2Fimage.png?alt=media\&token=2beff5e7-a7e4-4acf-a8cd-613fd3c01e2c) ![ROV ballast weights hold the unit underwater and vertical even if the boat is drifting. We use four weights.](https://2180742755-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTLwTkS60mCJ7pYKVd2G5%2Fuploads%2FoTBeznmmAnKzou7azEeY%2Fimage.png?alt=media\&token=e6fdbb39-3261-4f31-9610-8f4516beb352) ![Mk II receiver on a chain fixture, ready to drop into the water.](https://2180742755-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTLwTkS60mCJ7pYKVd2G5%2Fuploads%2Fu7tjOtMhKw0WO0Qrudmu%2Fimage.png?alt=media\&token=335b9270-f0f1-4d80-a0eb-7921177249ab)