Entering a POI directly on the watch using coordinates

[CarlW]

Hello

Just moved from Garmin to Suunto and trying to figure out the Vertical 2 when navigating beyond and out of reach of any kind of phone/internet connection…ie, I do not want / I can not, use my
iphone/phone.

User Scenario question:
Seeing, in the dead of winter, a storm brewing and closing in fast, creating, on the fly, a new POI, being a possible place for sheltering, using only coordinates taken from the paper map held in front of me, in this case not Lat, Long since these are not optimal using a 2-d map, but for example MGRS or similar coordinates…
Is this possible on the suunto Vertical 2?
If not, what are possible workarounds that people on this forum have found?

Many thanks for reading my question and even more thanks for any answers/input
Carl