My Rocna anchor is fantastic, but it always seems to come up into the stem head roller the wrong way round. This looks like the effect of the water flow over it causing it to turn over. Does anybody else recognize this problem?

we had a 20kg rockna on our 8.4 ton cat.  and it did work fine but stronger winds. we did drag a few times,  so we went up to 33kg (biggest that will fit on our setup.
And on our trip to carib and back 16/17,  we only draged once, it was on deeper w, and buttum was very hard,  so mostly we did not get it to digg in.
Rockna has been good to us.. we sleep well with it digged in, and pulltested,  2 motors 2000rpm,  and even more if we know there will be havey winds/waves.
we also haVE A SPADE 15KG, TO USE ON THE BACK, if we go for a shorter stopp with the bows to the rocks, (norwergian style)

+x

 

Geir Ove Bø - 8/2/2020

we had a 20kg rockna on our 8.4 ton cat.  and it did work fine but stronger winds. we did drag a few times,  so we went up to 33kg (biggest that will fit on our setup.
And on our trip to carib and back 16/17,  we only draged once, it was on deeper w, and buttum was very hard,  so mostly we did not get it to digg in.
Rockna has been good to us.. we sleep well with it digged in, and pulltested,  2 motors 2000rpm,  and even more if we know there will be havey winds/waves.
we also haVE A SPADE 15KG, TO USE ON THE BACK, if we go for a shorter stopp with the bows to the rocks, (norwergian style)

Hi Geir,
Thanks for the field report: always the best kind of information.
More weight in the anchor certainly, to my mind, is the best use of weight to promote good sleep habits. That said, I am surprised your 20kg Rocna dragged after setting. Is it possible that it was a scope issue? Especially if on a catamaran where the use of rope rather than chain is more common.
Or was there a wind shift or current change that might have contributed? I believe it to be fairly well established that Rocnas, on occasion, fail to re-set after being dislodged.
I can only imagine that a 33 kg Rocna has nailed you to the bottom (barring the above-mentioned wind shifts). I have the same weight anchor (SPADE) on my almost twice the weight cutter and most people consider that over-kill. But I sleep very well.
That said some of the Carib and Bahamas anchorages are like trying to anchor on a concrete landing pad: impossible to get the anchor in.
My best, Dick Stevenson, s/v Alchemy