Probably yes, those are the letters in GPS coordinates they might need to input. However, the standard with global coordinates as two floating point values is that Ⓝ and Ⓔ are positive while Ⓢ and Ⓦ are negative so they could just use that.
Anyway, they should have just used a QWERTY keyboard and added an extra N on top for the logical layout of
<span style="color:#323232;"> ┌N┐
</span><span style="color:#323232;">Q W┼E R T...
</span><span style="color:#323232;"> A└S┘D F ...
</span><span style="color:#323232;"> Z X C V...
</span>