Many thanks for the responses everyone. Really helpful. Rather than reply to every email separately, I've taken the liberty of putting the shorter ones into one response. I hope that's ok.

Evyn wrote:

>Do ATVs have transponders, they sure could.

>As for artificial gravity, I could ATVs on high gravity worlds having it.

Ok, thank you will take that as meaning my ‘optional’ notation is spot on for both. I’m thinking the grav particularly would be a (perhaps expensive) high end option and the transponder required on higher tech worlds (or law level) but not necessarily always. I think I’ll leave whether the March Harrier’s ATV has either something for thrashing out in a game session.

Jeffrey makes that point with:

>Yeah, there should be a transponder. Pretty much required for driving on TL10+ worlds,

>where there's a Roadgrid.

Jeffrey also wrote:

>That looks freaking professional!

>Really sweet.

oh! Thank you. Between ‘something I threw together in PowerPoint’, my lack of electronics knowledge, and my general lack of artistic ability, I thought it might be a bit too rough and ready for some. Looking at it again, I'm quite taken with it already!

>>- is 'bus' the right word? I'm sort of imagining the main ESS feeding 'big' subsystems (to the

>>right) more directly but the internal and external 'small' electrics through some sort of step down

>>if that's the right expression.

>Yeah, but "bus" gets used for a lot of different things.

That I’d gathered (and remembered the computer one) which is why I was a bit cautious about using it.

>Is the energy storage batteries, or microfusion plant?

>In the latter case, Starter applies.

>Although, there's a "Start" button in Tesla's, which tells the car computer you're ready to start

>driving.

JTAS 3 is quite clear: it says “energy storage system” – so I’ve presumed a stonking battery. Although perhaps “one” under the floor plates of the ATV and spread out (a bit like HMS Alliance, a WWII submarine you can visit about five miles from my home).

Tom R wrote:

>I like the diagram which reminds me of the diagrams used in Renegade Legion.

Thank you. I don’t know Renegade Legion, I’ll have to see if I can find some images. Near completion it started reminding me of the diagrams in _Starship Operator’s Handbook_.

cheers