Should be alright at least up to BullCreek water ski area and Ascot, probably more but haven't been any higher then that and it was like 20+ years ago.

Download the maps and you'll get some idea of how far you can go,
www.transport.wa.gov.au/imarine/Gregory-to-Perth.asp#36360

Also if you don't already have one maybe invest in a cheap fishfinder so you'll know the depth you are in , one with a GPS would be a bonus but even something like this
www.bcf.com.au/p/lowrance-hook%C2%B2-4x-fish-finder-bullet-transducer/551789.html?cgid=BCF012505#start=6
will give you the water depth.

And if everything else fails remember to carry a long pole with a flat foot when sailing in shallow waters so you can start the outboard and push yourself out of the mud.

ss22s said..
Will I need to wash down the boat after everytime I take it out sailing in the river. It permanently stays on the river in SOPYC.

Depends where you are moored, so long as you are no where near a slip way should be fine once a month. From memory thats what I did with my Spacesailer 22 at SPYC.

Ilenart

Thanks all for the info and help.

Yeah I realised there are going to be alot of bridges to go through.

Fishfinder with depth monitor is a great idea.

I'll have to start looking for a long pole then and practice pushing my boat :p

Yeah, previous owner also washed it once a month.