It is intended for travel around a class M planet, and Ground-orbit-ground transportation. Trim ranges from very basic, like a bus to luxury models for VIP transport.
It was used in the second half of the 23rd century, making up a lot of public transportation on human worlds in the 2270s.
As it was superceded, exampless were sold off for use by private owners - some examples are still flying.
It's period of widest useage is from 2265 to 2300
This type is the "Airtram" from TMP. I have always liked it as a shuttlecraft - although it is never seen in this role.
I named it for the notable Trek fan Bjo Trimble.