Hi Gurú! I’m using the /M cause the ENACOM rules. Here we have this particular region (provinces) identification.
So, the /P is not portable operation, it means you are away from your qth operating at the San Juan province.
Same for Mendoza. We have the M identifier and if we are away from the qth we have to add the /M modifier.
Thats why the Mendoza SOTA Association is LUM and Córdoba is LUH…and so on.
Hope that helps to understand why I use it.
73!