Which POI types are supported by Garmin?

[Schnee]

Hi,

I have this kind of POI in my map:

[POI]
Type=0x1604
Label=3
EndLevel=3
Data0=(46.90578,-75.10477)
[END]

It is supposed to be a red triangle, but it does not appear on the map, at any zoom level.

However, I have other POIs like elevation point:
[POI]
Type=0x6300
Label=4
EndLevel=3
Data0=(46.90510,-75.10975)
[END]

and these work normally.
If I change my 0x1604 POI for type 0x6300, it also appears at the right place at a certain zoom level.

So I conclude that type 0x1604 is not supported by my Nuvi 1370.
My question: is there a list of POI type supported by Garmin somewhere ?

Thanks