Fleet Book Tonnage

What is the tonnage given in the Fleet Book? Is it the same as that used in
Traveller (displacement liquid hydrogen isn't it?) or is displacement
something else? (water?).

> What is the tonnage given in the Fleet Book? Is it the same

I used the term "displacement" in the maritime sense, just to keep the
"naval" feel - it is simply the ship's mass in metric tonnes.

The tonnage is actually mass in tonnes (metric tons, 1000 kg), and the FB has
it as 100 tonnes per Mass. Traveller's 'tonnage' was a measure of volume
(volume displacement of 1 tonne of liquid hydrogen), which also gave an
average mass when using the density of water (???) at least as far as

TNE went. As far as a spaceship is concerned, at least ones as
high-tech
as FT's, volume is not a consideration - mass is.  Well, how spread out
it
is would be a concern as well, but there's not a lot of 'open-frame'
type ships in FT (too bad:).

Noah

[quoted original message omitted]

Noah Doyle wrote (in a post where the entire previous post:was still attached,
although *this* time at least it wasn't too large...):

> Traveller's 'tonnage' was a measure of

Of course it did. One tonne of Mass is one tonne of Mass, no matter what
substance you use... it's the volume that changes: 1 tonne of liquid hydrogen
is roughly 14 cubic meters, while 1 tonne of water is 1 cubic meter.

> As far as a spaceship is concerned, at least ones as high-tech
type
> ships in FT (too bad :).

They are warships. An open structure is a sot harder to armour than a closed
one...

Regards,

In message <l03010d03b1cc1b95db06@[195.188.107.161]>
> Ground Zero Games <jon@gzero.dungeon.com> wrote:

> >What is the tonnage given in the Fleet Book? Is it the same

Okay, thanks. I assumed 'displacement' meant it was really a volume, rather
than a mass, measurement.

Well, it would be displacement if you floated it in water in a 1g field...not
that that happens much with the bigger ships, but I can see landing some in
water ports, even hiding them underwater (the famed Traveller submerged SDB
tactic)

Noah

[quoted original message omitted]