Tree climbing competitions offer a strong learning environment, which is why Treetools urges new arborists to attend.
Gear setups and manual interpretations vary, so discussing them reminds and teaches participants.
This question—whether the use of the Rook/Hydra is mandatory when climbing MRS, or if alternative configurations are acceptable—comes up frequently. It illustrates how gear interpretation leads to valuable discussion and learning moments.
The NOTCH Rope Runner Pro User Manual shows the Rook as the bridge attachment for both SRS and MRS.
Later in the manual, the Rook appears again for MRS. NOTCH advises ensuring enough space between the Rope Runner Pro and the static side of the MRS line to prevent rope interference (see 7B Precautions for Use).
Some climbers and TCC technicians believe using the Rook/Hydra is required for MRS. Others argue that, if so, you must use it as the bridge connector in both systems, since that's how the manual shows it under 'Field of Application.'
Both opinions have merits, but it’s unlikely that using Rook/Hydra is mandatory.
On checking with the technical team at NOTCH, here is the official answer:
“No, the ROOK (Hydra) is not required; it was just a reference in the illustration, and it would also give the most clearance between ropes in MRS. However, there are other items out there that would also work.”
The takeaway: Always ask questions. Tree-climbing competitions help everyone learn.
