Strange, the background image of the site's header shows a very nice cockpit font indeed, but the actual B612 font is quite different - for instance zeros have no line through them. Though the oxygen indicator seems to use this font.
Yeah, that always bugged me! The zero-with-a-slash only seems to be used in that flight plan section of the screen; all of the other zeroes are without the slash. And the "5" and "4" next to the zero-with-a-slash in the waypoint 5240N is clearly the B612 glyphs. So it makes me think that in the Airbus software, in contexts where there might be ambiguity between 0 and O or where there are mixed letters and numbers, they use the zero-with-a-slash, but everywhere else (numeric-only readouts, etc.) they use the non-slash zero.
And I wonder if there's a 0-with-a-slash in the downloadable version of the font, enabled with an OpenType stylistic set number or feature or something, or if that zero-with-a-slash is just something custom the Airbus folks do internally.
> And I wonder if there's a 0-with-a-slash in the downloadable version of the font, enabled with an OpenType stylistic set number or feature or something, or if that zero-with-a-slash is just something custom the Airbus folks do internally.
According to the Github issue mentioning in a sibling comment:
> We designed the two zeros having in mind the slash one to be used in alphanumerical sequences, and the normal one to be used in numerical sequences.
>
> You can find it in the ‘private use area’
While there is a glyph like that there's no nice way to access it. There is no font feature to enable slashedzero by default and slashedzero is not mapped to U+0030 U+FE00 (Unicode's standard variant for an explicit slashed zero). Instead it's only accessible using the private use codepoint U+E007 and then typically doesn't get copied as a regular zero.
But more generally the font has an empty GSUB table which would be used for such substitutions. I'm wondering if the cockpit display maybe misses support for that and that's why they tried not to use it for anything.
It’s very unfortunate that these glyphs are not available via OT features or font-variant in CSS. I assume the cockpit software uses glyphs directly instead of using OpenType.
There are two open tickets about it, the second is almost four years old, maybe someone here who is familiar with the tooling could contribute?
I don't think any amount of tooling knowledge could facilitate a contribution at this point. It's a dead project. The best anyone could do is apply the steps in issue #24 to a fork and start promoting it.
It's really unfortunate that this glaring issue stops wide adoption. The slash through the zero should have been the default, very silly for the official release to omit that.
The image shows a 0 without a line as well. Maybe the other one is a Ø? Or maybe there are conventions to use slashed zeroes in some places an non-slashed in other places?
