For ship to ship, like my Godson's dad Rob was dealing with in the RCN, the two ships run parallel, they exchange fuel, supplies, mail, and if needed, crew or passengers and I believe multiple of the possible transfer contents are in fact exchanges in parallel (vs. serial) fashion.

The idea is to get the stuff moved safely across in the minimum time so that the ships can break away and get to safer distances from one another (also removes the 'two sitting targets that can't maneuver' aspect vs. surprise engagements).

One could rule that the one ton applies to passengers, freight etc. while the fuel transfer is separate.

https://en.wikipedia.org/wiki/Underway_replenishment

I learn stuff every day... and today I learned that Chester Nimitz developed one of these and was an engineer. I knew he'd become an Admiral, but most of them come out of surface warfare officer streams (I think), at least in our forces.

On Mon, Jul 13, 2020 at 10:16 AM Thomas RUX <xxxxxx@comcast.net> wrote:

Hi Rupert,
> On 07/13/2020 6:29 AM Rupert Boleyn <xxxxxx@gmail.com> wrote:
>
>
> On 14Jul2020 0108, Thomas RUX wrote:
> > Morning kaladorn,
> >
> > MgT HG 2e p. 47 "UNREP System: This is a system designed to allow for
> > replenishment and resupply of warships while in motion, and is vital
> > to the function of squadrons in unexplored or hostile systems. The
> > system includes fuel hoses, cargo transfer tubes, and other gear
> > designed to move ordnance and freight between two ships (though only
> > one of the ships is required to carry the UNREP system). Each ton
> > dedicated to the UNREP system allows transfer of 20 tons of fuel,
> > cargo, or ordnance every hour. An UNREP system costs MCr0.5 and
> > requires 1 Power per ton."
> >

> > Tom Rux

> I'd have thought the fuel would be transferable in parallel with the
> cargo and ordnance, seeing as fuel would presumably go through pipes and
> the rest would move via some kind of conveyor system.

The MgT text does not, in my opinion, provide enough information on whether or not fuel transfer was being done in parallel with cargo and ordnance or the equipment used to transfer the cargo and ordnance between ships during underway replenishment (UNREP).

My only experience with underway replenishment was on the USS Simon Lake AS-33 which used helicopters to transfer cargo while both ships where moving known as vertical replenishment or VERTREP.

However, USN boot camp, navy training films, and a number of movies and documentaries showing UNREPs have shown that fuel hoses, cargo, and ordnance being transferred at the same time. Cargo and ordnance are transferred using cables and winches.

I envision a similar system being used in MgT.

Tom Rux
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