[Rhodes22-list] Swinging at anchor?

[ROGER PIHLAJA]

Hi All,

By the time I put up the pop top + enclosure and the cockpit boom room enclosure, S/V Dynamic Equilibrium has so much windage aft of the center of buoyancy; that, the bow always points strongly into the wind, like a big weather vane.  This weather vane tendency is so strong it overwhelms any effect that the off center pull from using the bow chock/bow cleat vs. the bow eye might cause.  Yes, in theory, the off center pull does generate a torque that might cause the boat to sail around its anchor.  But, the weather vane effect from the excess windage aft completely dominates the boat’s response to a wind shift.

We don’t have tidal current shifts here on the great lakes and rivers always tend to flow in the same direction.  I’d be interested in hearing from ocean sailing Rhodies regarding whether anchoring from the bow eye vs. bow chock/bow cleat makes any difference in the way the boat lies to a current vs. the way it lies to the wind.  My expectation is that there is very little difference; but, I’d like to hear from people that have actual experience.

Regarding the question about using the bow eye vs. the bow chock/bow cleat when tied up to a mooring – Commercial moorings usually have a huge mushroom anchor or engine block buried in the mud and all chain rode up to the mooring ball.  This setup has little, if any, shock absorbing properties.  But, isn’t the pennant from the mooring ball up to the boat usually nylon?  Isn’t that where the shock absorbing is supposed to occur?  If so, you definitely wouldn’t want to use chain here.  Given the huge size of the mooring anchor and all steel chain rode, I don’t think it makes much difference whether you use the bow eye or the bow chock/bow cleat when tying up to a mooring.  That huge, deeply set, mooring anchor is not going to move no matter how much or how little scope you let out.

Roger Pihlaja
S/V Dynamic Equilibrium

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

From: Peter Nyberg<mailto:peter at sunnybeeches.com>
Sent: Thursday, April 23, 2020 9:40 PM
To: The Rhodes 22 Email List<mailto:rhodes22-list at rhodes22.org>
Subject: Re: [Rhodes22-list] Bow Eye vs. Bow Cleat?

I am in total agreement with Roger on the benefits of anchoring from the bow eye rather than the bow cleat.

My approach to doing so is a little different.  I have 10’ of 3/8” line with a thimble in one end permanently attached to the bow eye with a shackle.  I refer to this line as my ‘painter’.  When I’m not anchored, the painter is looped over and tied off to the pulpit.  After I’ve anchored, I attach the painter to the rode, and let out more scope so that the painter takes the load.

In addition to effectively increasing your scope, this approach eliminates any chafing that might occur where the rode comes over the toe-rail.

I originally tried this approach because someone way back in the archives suggested that it would reduce the tendency of R22 to swing on its anchor.  Unfortunately I did not find this to be true to any significant extent.

Peter Nyberg
Coventry, CT
s/v Silverheels (1988/2016)


> On Apr 23, 2020, at 5:51 PM, ROGER PIHLAJA <roger_pihlaja at msn.com> wrote:
>
> Hi All,
>
> There is a real advantage to rigging the anchor line thru the bow eye vs. directly to the bow cleat.  The choice of the bow eye vs. the bow cleat has a significant effect on the anchor scope.  This is because the bow eye is ~1.5 ft closer to the water vs the bow cleat.  For example, suppose we are anchoring in 7 feet of water.  The bow eye is ~2 feet above the water and the bow cleat is ~3.5 feet above the water.  Suppose we let out 65 feet of anchor rode.  The scope using the bow eye is 65 / (7 + 2) = 7.2  The scope using the bow cleat is 65 / (7 + 3.5) = 6.2  A scope of 7.2 is sufficient for decent overnight holding with a minimum 65 foot radius swing circle.  A scope of 6.2 is marginal for an overnight night stay.  Sometimes, there isn’t sufficient swing room to let out more anchor rode, say if you are the last boat to drop the hook in a crowded anchorage.  In addition, it’s considered bad anchoring etiquette to use up all the swing room in an anchorage even if you are the first one there.
>
> Fortunately, you don’t have to tie off to the bow eye in order to get the scope advantage of using it.  Simply run the anchor rode thru the bow eye first, then up to the bow cleat, and cleat it off.  This will give you all the scope advantage of using the bow eye and all the ease of tying off to the bow cleat.  When departing, reach down and hook the anchor rode with a boat hook below the bow eye.  Pull the anchor rode on board, hang on to it, and then uncleat the rode from the bow cleat.  Easy peasy and no stress on the knees!
>
> I always use the bow eye in the manner described above.  There is just no reason not to, the extra safety margin on scope helps me sleep better, and I don’t annoy my fellow boaters.
>
> Roger Pihlaja
> S/V Dynamic Equilibrium
>