Last week my long centre rope parted while single-handing up a broad (Rochdale) lock, due to repeated lockside abrasion. Of course the boat was all over the place, which was quite scary. This rope (dark blue polypropylene - you'll recognise the type) has only lasted a year, and in fact showed signs of abrasion after only a day's use - I wasn't impressed.
My other centre rope, with two loops for simply dropping over bollards, which has had far more use on other waterways (can't use it on the Rochdale because the bollards are huge), shows little sign of abrasion. It looks like natural hemp, but may be synthetic hemp lookalike.
Which type of rope has most abrasion resistance? Natural hemp, synthetic hemp, stranded, braided, etc? I do most of my boating single-handed through wide locks, so a certain length of the centre rope gets a lot of wear.
Mac