R25/OB Holding tank level?

[baz]

Subject: R25/OB Holding tank level?

I'm told that to determine the level in the holding tank for the R25/OB (model year 2021+) is performed by line of sight. Can someone detail how this is done, and where the holding tank is located so its level is clearly observed. Thanks 🙂

 

[GypsyMoth]

On our 2021 R27OB we were shown an 'inspection window' on the side of the holding tank. Remove the step cover between the head and the hanging closet and using the camera on my phone I can take a picture slightly aft and starboard. Can't see it without a camera or mirror.

You can see a picture at:
https://gypsymoth.smugmug.com/Boat/i-qvZdcLF/A

Can't say if your R25 is similar...