- In EVE, ships and all other objects in space have radii which entail spheres around them.
- For a given piloted ship, the distances of other objects are measured from the nearest edges of their spheres to the nearest edge of the ship's sphere.
- Objects anywhere
*inside*a ship's own sphere are reported to be at zero distance.

- Objects anywhere
- We can think of this sphere, as Shamus Donohue did in this talk, as a ship's "zero-sphere".
- Radii (especially on most subcaps) are so small that this mechanic is often not hugely consequential to gameplay, but when short distances are critical it can be very consequential.
- I list the radii of all ships here and those of all ships & objects can be seen at e.g. EVE Ref.

- For a given piloted ship, the distances of other objects are measured from the nearest edges of their spheres to the nearest edge of the ship's sphere.
- A piloted ship is prevented from warping by a bubble if that bubble is within disruption range of any edge of the ship's zero-sphere.
- A piloted ship spawns around a gate such that the closest edge of its zero-sphere is somewhere within 11,500 to 13,499 m of the inbound gate's zero-sphere.
- The center of a piloted ship can be seen in space by left-clicking its 3D model to put a selection circle on it.
- Anchorable bubbles, when launched, appear in a random location 1,180 m from a ship's zero-sphere.
- Therefore: you can gain or lose a bit of bubble range relative to what you're bubbling depending on where the bubble pops out (i.e. was it towards or away from what you're bubbling).
- As an example: if anchoring bubbles in a Mammoth—the largest subcap hauler—there is a 3,594 m-wide sphere around the center of the ship on which bubbles will appear in space.

- Therefore: you can gain or lose a bit of bubble range relative to what you're bubbling depending on where the bubble pops out (i.e. was it towards or away from what you're bubbling).
- All types & sizes of anchorable bubble have radius 70 m; ergo, from an anchorer's perspective, the edge of an anchored bubble's disruption zone will be at its disruption range plus 1,250 m (1,180 + 70).
- One T2/Faction Large anchorable bubble can envelop all gates up to and including the Caldari Region.
- The check for this is whether bubble radius > gate radius + max spawn radius + 5 km (minimum anchoring distance).

- EVE rounds m to the nearest km, and interdiction probes are launched from the center of a DIC's model and have radius 1 m.
- The smallest DIC (Flycatcher) has radius 112 m, and the largest (Heretic) has 144. Eris and Sabre have 138.
- Therefore, if your overview says a ship is "20 km" away, it's actually anywhere from 19,500 to 20,499 m away
*from the nearest edge*—not the center—of your DIC. - Ergo, it's 19,612 to 20,643 m away from where your probe will be when you launch it, depending on your hull. If you're stationary, odds are it gets away, but you
*can*catch it. Take the chance!

- HIC bubbles project from the edges of their zero-spheres to the disruption range(s) of their cycling WDFG(s).
- How close one can get a ship's center to the bracket of a gate (which represents the gate's center) depends on the collision models of the ship and gate, which aren't visible to players but can be inferred.
- To that end, note the links in the Closest Spots column of the gates table on the tackle page. These spots are, tmk, the closest reliable positions on gates.
- Collision models are not the same as zero-spheres, though collision models are never
*larger*than zero-spheres.

- All DICs can completely surround all gates up to and including the Gallente Region. HICs can cover different gates depending on the type of WDFG fitted; a faction WDFG
*just barely*covers the Minmatar Region. - If you're in a bubbler on a gate whose spawn diameter is larger than your bubble, being at its center isn't very useful. Being off the collision geometry with a preheated MWD is better.
- For frequent camping of a specific gate which a bubbler can surround, save a dedicated bookmark as close to its icon as possible. The bookmark can then be approached.
- With
*any*bubble—DIC, HIC, or anchored—one should pay attention to positioning, but especially on the larger and knobblier gates.- Note that various viable gate & bubble type combos produce
*exceedingly little*bubble depth. Multiple ships/bubbles is almost always an improvement.

- Note that various viable gate & bubble type combos produce
- Smuggler gates are deceptively small. Most empire-style region/border gates are quite large, but the comparatively-rare Smuggler can be easily cocooned by a single DIC.
- HIC points/scrams prevent all capital ships from jumping stargates,
*but not Ansiblexes*(excepting regular i.e non-jump freighters and Orcas, which could be classed*pseudo-capitals*). - To see a ship's distance to the center of a gate (instead of to its zero-sphere), save the gate as a bookmark then hover the cursor over said bookmark.