There are a few things I've been wondering for a while, most of it is involving the fluff. I do not own all of the DW books, so if there is something I'm asking that's in one of those books I'm more than glad if I get pointed towards it.

Without further ado...

1. Would a Dark Angel (or any of the DA successors) be afforded a right to bring a Nephilim Fighter into service for the Deathwatch? If so, how would those statistics pan out in-game?
2. How much of the Omega Vault has been catalogued in the present day, and what is the strangest thing to come out of it (whether in the books or from anyone's game)?
3. In "Rites of Battle" Hive Worlds are classified as a potential Space Marine homeworld and that Space Marines on them have access to a (virtually) unlimited supply of munitions. This raises the question...who exactly supplies Space Marines, and how limited are supplies to chapters that don't have direct manufacture?
4. Also relating to homeworlds, have there ever been any dragon-like creatures on a Space Marine homeworld (excluding Salamanders or chaos beings)?
5. Game-related, have there been any STC hunts in the Jericho Reach?

1) I've never heard of any Chapter-specific vehicles being used by the Deathwatch.

2) Don't Know.

3) I believe the Adeptus Mechanicus supplies most Space Marine munitions, as part of the deal that allows them to govern themselves, and not pay a standard Imperial Tithe.

4) The only other 'official' dragon-like creatures on SM homeworlds that I know of are the dragons that live in the oceans of Fenris. That said, many chapters are from Deathworlds, where huge saurians would sometimes be the world's 'apex predator'.

5) Don't know.

A fairly important thing to keep in mind is that the background is somewhat malleable - once you delve deeper into the fluff and compare sources, you'll notice how they start to contradict each other on a regular basis, simply because the IP is a matter of interpretation. What is important, however, is to keep the appropriate tone/atmosphere.

So, don't fret to come up with new ideas (such as the STC or the dragons you mentioned), or contradict existing ones; FFG has done it themselves numerous times in their books versus Codex fluff, and for your own game you have just as much of a right to do so. Just make sure you have a consensus in your group, so that everyone is on the same common ground!

That being said, I believe I can at least offer some possible inspiration in regards to your 3rd question:

In GW's version of the setting, Space Marines in the 41st millennium are intended to function somewhat independently, meaning the majority of Chapters would not have a steady supply chain connecting them to other Imperial agencies, for this would make the Astartes depend on whatever faction controls the source of their supplies. Instead, most Chapters are granted a homeworld/fief that, in the best cases, supplies all the raw materials needed to produce arms and ammunition in the Fortress Monastery's own forge.

That is not to say that the Chapter may not at least partially rely on trade, however. Also, of course the initial founding where the Chapter is established will be a combined effort where multiple Imperial agencies cooperate to provide the Space Marines with the bare essentials necessary to fight in the Emperor's name, meaning a sort of "starting cache" of weapons and other war materiel crafted by the Adeptus Mechanicus.

Fleet-based Chapters would have to request or requisition whatever they need at whichever place they show up. Although this makes them more dependent on the Imperium as a whole, the Chapter's mobile nature at least prevents them from falling into dependency to a singular faction or individual; if one world is denying their request, the Chapter could simply jump to the next, and is certain to remember the refusal.

An older issue of White Dwarf detailing the Third War for Armageddon mentioned an anecdote about the Relictors (which could perhaps be called fleet-based now that the Inquisition has revoked that Chapter's right to a homeworld), who were able to resupply at what seemed like a random Imperial world that had never before dealt with the Chapter:

"As the first phase of the campaign drew to a close, and the Season of Fire approaced, a ceasefire of sorts was achieved, with both sides digging in to weather the coming storms. Many Space Marine Chapters withdrew, as their lightning attack style of warfare was of less relevance in this new stage of the war. First to withdraw were the Relictors, who, with no explanation whatsoever, emerged from the jungle, boarded their Thunderhawk gunships and simply left. Imperial Navy picket ships in orbit challenged them, and a violent confrontation between supposed allies was only narrowly averted when Commander Dante ordered the picket ships to stand down and allow the Relictors' ships to rendezvous with their fleet.

Don't forget the ships are so large that they can hold their own factories to churn out standard consumables like ammo and armor even if they don't' have an industrial homeworld.

1. Probably not

2. A set of librarian force armor. (built with Psi-lattice circuitry so the Psy rating adds to the armor strength) we were rank 5 by then.

3. I always assumed a portion of the imperial tithe went to outfitting of space marines if they didn't have their own mining sources. This would most likely be in the form of raw materials for their own chapter forges.

4. I'm with adeptus-B I know none, but I'm currently working on a chapter called the Wyvern knights were on their home planet there are mighty flying serpents.

5. I've actually wondered about this myself. I'm going to have my group find the STC for the old astartes Jetbike. Cause I think it's something the Deathwatch should have access to.

1. I doubt it. Brininging your personal wargear is one thing. Half-inching a tank or jet fighter is another entirely.

1. No. Unless he was a high ranking member of the Inner Circle but he probably isn't so no. Like what Magnus Grendel said, armour is one thing, a jetfighter is another.

2. The Fabled Drunian, or a hair of the emperors head.

3. The government's factories can do this, usually out of pride or profit or defense or fear. The limits of other chapters can depend. For example the Knights Errant are misers because they lack the forges to produce equipment.

4. Fenris is the only example I can think of.

5. I don't think so but plan to make my players involved into a STC hunt, maybe they find the designs of an ancient super weapon?

Thanks, a lot of my curiosities have been answered and some of my sillier "what ifs" are laid to rest. I doubt the Dark Angels or the Unforgiven would want their top secret jet fighter engines falling into wrong hands, anyway.

With any fortune I'll be able to put some of this knowledge to play before long, but that will depend on how quickly I can get into a group. First-time player and all that, despite pouring over the rulebooks again and again!

4. Flesh tearers homeworld (Cretacia?) has giant saurian creatures. The death world of Luther Macintyre has mica dragons.

4. Flesh tearers homeworld (Cretacia?) has giant saurian creatures.

Good call:

http://redelf.naxx.ru/w40k/ia/w40k_ia_ft.html

1) If you want to introduce a Chapter specific vehicle into the game your best bet would be to have the Chapter gift it to the Deathwatch. In my campaign I have introduced the idea that most of the Deathwatch vehicles are actually from other Chapters and are loaned to the Chamber Militant Order either in repayment of a service or in lieu of a marine or number of marines taking up the Oath.

So far the Kill Team has used

Warrior's Heart: Rhino (Storm Wardens)

The Spirit of Reconcilliation: Whirlwind (Mantis Warrior)

The Emperor's Fury: Predator (Avenging Sons)

Unnamed: Rhino (Unknown Chapter/Deathwatch)

1. Not really no, the DA are notoriously uptight about their own stuff (especially where it involves the Fallen), and that more than likely extends to their unique vehicles (the Nephilim is not a DA only craft, it's a Ravenwing only craft). Plus, you know, don't split the party and all.

2. I'd say not a whole lot has been cataloged, and since it seems to be more like an everchanging maze than a set of fixed rooms, I'd say less than we think.The strangest things my players found was a cogitator bank meant to predict the future dating back to the Great Crusade, and whose predictions have always been true, but are always computed slightly too late to be useful. However the latest cogitations all seem to have been innocuous, simply stating the coordinates of dead worlds on the eastern fringe of the Reach.

3. Has been more or less answered, but basic ammunition and provision should be relatively easy to acquire from any decent Mechanicus enclave or civilized0 world. Anything more complex than that and you'll need to find a Forge World or at least a serious manufactorum complex run by the Mechanicus.

4. To add to what has been said, some of the Primarchs' homeworlds have nice dragon like creatures, like the Silver Wyrms of Medusa (assuming that Asirnoth was not unique), and the Salamanders of Nocturne (with the Fire Drakes of Mount Deathfire actually being fire-breathers).

5. Not any official ones that I know off, but in my game the Mechanicus have been investigating some of the items extracted from the Omega Vault that appear to match the description of ancient weapons used against the Men of Iron.