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I have an easy classification, If it has a toilet in it I call it a B

I would say O then.

According to the golden rule...

There are two different systems of classification. Under one it is an 'A' and under the other it is a 'B'.

The "Wind" system calls it a 'B':

If the wind blows under it, it's an S.
If the wind blows over it, it's an E.
If the wind blows through it, it's an A.
If the wind blows around it, it's a B.


But the "shape" system would make it an A:

A horizontal line is an S.
A solid shape is a B.
A flat plane is an E.
A vertical line is an A.

what would you call the Russian/Ukrainian Woodpecker mentionned in the other thread ?

I know some people who used a smokestack to qualify for BASE.

Those people are retards. It's an O.

From Sabre210:

There is a history to this idea and it stems back to around 2003 with an idea floated by Neil Queminet. I suppose it was never satisfying to have only B A S E and the all encompassing O for everything else with which to classify the objects of our desires. BASE seemed to have so much more to offer in terms of different and varied launch platforms and jump types. And so with a nod to the acronymic history of BASE and a tongue firmly set in cheek, I offer you the UK premiere of an A to Z of BASE as imagined but never fully verbalised by our dearly departed Neil.

I would like to point out just a few small things first.

1.First off, this has been given a lot of consideration and hasn't just been pulled out my arse in a moment. As i said, Neil was throwing out these ideas many years ago and even after his death much thought was given towards objects and what makes each so different.
2.Secondly, there is no self interest in this list. I never came close to being able to lay claim to one of every category and were i still active i dare say i wouldn't even be trying to complete it. Would be interested to know if anyone has completed it though!
3.Thirdly, letters like B anc C are hugely overscribed whilst you try finding an object type beginning with X. Thus, some creative interpretation and poetic license was required. Not all letters are objects, some are a type of jump. Where you see a letter with a number affixed (B1, B2),both/all parts are required to qualify for the letter, When you see (alternative) in brackets it's an option to qualify by jumping either /or.
4.Fourthly, don't get your panties in a lather if you can't spot a certain object type, like Antenna. It might be more fancifully described further down the list. It goes without saying that not all objects are covered here. Sadly Grain silos, the vast array of different bridge construction types, the plethora of unique building shapes simply had to be condensed into broader categories.
5.Fifthly, i have included some stipulations and they are included for good reason. Not all antennas or buildings were born equally. Some have unique dangers, quirks which set them aside from others. Whilst specific in some respects they are not site specific. Anyone the world over could, with a small amount of travelling, dedication and (most importantly) skill, achieve this. There are hundreds of objects that would qualify for each and every letter.
6.Lastly, no one said it would be easy and it is just a bit of fun. If someone is stupid enough to take on jumps beyond their capability just so they can attempt to put a tick in a box, well i guess they might end up in a box.



If anyone wishes to share a story pertaining to an jump or object listed then please do so, but be respectful of the no site-naming rule towards objects that might still be being jumped or may be jumpable still.

Without further ado, i present.......the A to Z of BASE. Let the genital measuring and bragging rights begin.



1.A - Amusement Park Ride (Rollercoasters, Ferris Wheels, Fun rides but excludes bridge-based bungee platforms)
2.B1 - Building (Under Construction) B2 - Building (Residential & occupied) B3 - Bridge
3.C - Chimney (aka Smokestack)
4.D - Dam
5.E - Electricity Pylon / Power Tower (tower carrying high voltage power lines)
6.F - Fortification (includes any ancient Castle Walls, Citadel walls or Watch Towers, Forts, Fortresses, Follies, Military gun emplacement bunkers)
7.G - Gas Tower
8.H1 - Hotel (Open for Business and occupied) H2 - High Street / Highway Jump. (any jump which requires landing on an ordinarily busy road or street and which requires jumping with groundcrew to stop traffic or jumped with precision timing to avoid traffic.
9.I - Inside jump. Any jump performed into a completely enclosed area (with roof) ensuring protection form external winds and which can be secured by keys. (i.e. Cathedral, Arena/Stadium with roof, Hangar)
10.J - Jailhouse jump. (A jump undertaken with security/police already alerted and waiting in the suspected landing area. Whether you were caught or not is another matter.) J (alternative) - Jock Jump. From a stadium/arena into a sporting venue.
11.K - Kinetic Jump - any jump where the exit point is moving relative to the landing area, including conveying apparatus or vehicles (Moving cable car, truck on a bridge, ski-lift, rotating Ferris wheels) But must still be a fixed object jump (ie not a skydive with base gear)
12.L - Lifting Apparatus (Tower Cranes, Dock Cranes, Elevators or similar)
13.M - Monument or Statue. (Any Jump from a Memorial erected to commemorate a person, place or significant event)
14.N - Natural (Any jumps from a natural structure: Cliffs, needles, natural arches)
15.O - Observation deck or Viewing Platform (Any jump from a man-made structure built at elevation for the purpose of providing panoramic views to the general public.) O (alternative) Oil rigs, or Oil platforms.
16.P1 - Pretext jump. Any jump which has been achieved after manipulating someone into allowing you access to an exit point/object which they would not have, had they known your true intention.
P2 - PCA (pilot chute assist: Any jump which has required the manual extraction of the canopy by another person, Includes Direct bag jump).
17.Q - Quasimodo Jump. (from any Cathedral / Church / Mosque or other religious building)
18.R - Radio Transmitter (With Guy Wires) R2 - Radio Transmitter (Freestanding)
19.S1 - Suicide barrier jump. (Any publicly accessible exit point which requires the scaling of fencing erected specifically to prevent suicides. These are above and beyond hand rails.
S2 - Static line jump (Any Jump requiring the use of breakcord or tape to assist deployment.) S3 - Slider Up jump (Any Jump with the slider packed up)
20.T - Tree (where the jumper's feet exit from a living tree. Can be on the edge of a cliff) T (alternative1) Trebuchet - catapulted or slingshot to deployment height T (alternative 2) Trapeze - using a rope swing to exit from.
21.U - Underground jump (Any jump into a cave, quarry or hole which is below ground level, has limited visibility, limited space for canopy flight and where the landing area is generally inaccessible without specialised equipment.
22.V - Vampire jump. Any BASE jump using a winged suit (includes prodigy but excludes tracking suits without wings)
23.W1 - Windmill or Wind turbine
W2 Window Jump (any jump requiring a direct exit from an opening window).
24.X - A jump from a Hospital (X-ray) or incinerator stack attached to a hospital
25.Y - YOU and only you. Solo jump: no witnesses, no groundcrew, no jump buddies.
26.Z - axis jump. Any jump with an intentional aerial manouvre. (Gainer, front loop, barrel roll etc)

So according to the shape rules, if there would be a building which is very very very wide (so significantly wider than high), would you then call it an E?

...just ask a 10 year old.

I've done plane and heli jumps with a BASE rig and I call them skydives. I've done all 4 objects several times with skydiving rigs and I call them BASE jumps. I was kidding guys in Italy and Croatia last week that I'm starting a new set of BASE numbers called, "freefall skydive BASE". You have to do all 4 objects using skydiving gear and no DB's or static lines, all freefall. I would allow a big pilot chute on lower than 1000'. We';d probably get some takers.
Rick H

I've done plane and heli jumps with a BASE rig and I call them skydives. I've done all 4 objects several times with skydiving rigs and I call them BASE jumps. I was kidding guys in Italy and Croatia last week that I'm starting a new set of BASE numbers called, "freefall skydive BASE". You have to do all 4 objects using skydiving gear and no DB's or static lines, all freefall. I would allow a big pilot chute on lower than 1000'. We';d probably get some takers.
Rick H