Most of us are now aware of the release of Geoid 18 from NGS. OPUS is now providing Geoid 18 solutions, so a model for us to be able to use in our Trimble software is needed. Below is a support bulletin from Trimble outlining the now available download in the GGF format for Access and TBC. At this time, it is a manual user download and installation, however instructions on how to load are included in the bulletin. Geoid 18 will be included in the next release of Trimble Business Center. If you need additional assistance on loading this model, or getting it transferred to your Trimble field controller, contact your local Frontier Precision support representative.