Motorola Type IIi Hybrid
From The RadioReference Wiki
A Motorola Type IIi Hybrid system has "blocks" of the system that are Type I Fleets/Subfleets and Type II talkgroups. All radios may be Type II, or the Type I radios might be used exclusively in subfleets while the Type IIs are used exclusively in talkgroups.
Motorola Type IIi Hybrid is a system that has Type I fleets and subfleets, and has Type II radios that are able to use those Type I fleet/subfleets. The common reason that an agency sets up a Type IIi Hybrid system is because they have newer Type II radios that they want to interoperate with older Motorola Type I radios, without having to create new Type II talkgroups.