Thank you for your question. Are you planning on using your own satellite imagery/basemap or are you using an Esri basemap?
I am having the same question. I'd like to use ESRI's basemap because the imagery is newer than what I have available. But do I need to use my own imagery?
@RachaelMurtaugh you can use the Esri imagery basemap in ArcGIS Navigator. You also have the option of using your own data/imagery if that works better for you. Make sure that you add the basemap you want to use in your map before you create your Mobile Map Package (mmpk) for use in Navigator. The basemap will need to be a tile layer for it to be available for offline use. Here is a link to some Esri provided basemaps: https://www.arcgis.com/home/group.html?id=3a890be7a4b046c7840dc4a0446c5b31&view=list#content