Craig McKibbin is in the final phases of training as his challenge to swim the perimeter of Lake Waikaremoana for his late brother draws closer.
Flaxmere Constable Glenn McKibbin was shot and killed on duty just over 20 years ago and Craig has set out to raise funds for local Flaxmere charity the U-Turn Trust.
"It is a wonderful organisation doing amazing things within the Flaxmere community. I have chosen them as my charity as my brother served this community."
Mr McKibbin, who was raised in Hawke's Bay but now lives in Hamilton, will be doing the swim completely unassisted.
He will tow a supply raft carrying his equipment and food, which he has named after Glenn's police number, D717.