Anchor upgrade question

C

Chris N Mindy

New member
Joined
Jun 2, 2020
Messages
2
Fluid Motion Model
C-242 C
Hull Identification Number
fmlt235l819
Vessel Name
Summer Salt
We have a R-23 and thinking about upsizing our anchor, it came new with a 11pds. claw style, it seems a little light. It grabs and holds at first in sand and mud but tends to let loose after a while, overnight it scary. Does anyone have any suggestions on a new heavier anchor?

Chris
 
Bumping post delayed in moderation queue.
 
For our R25 Classic we have a 22 pound (10kg) Rocna for the primary and a Mantus 25 pound in the cave as an emergency spare. We are very happy with the Rocna.
There is a 9 kg Vulcan anchor available but the next size down from the Rocna 10kg is a Rocna 6kg (13.2 pounds) which, for me, would be a bit light on a R23. Mantus makes a 17 pound (7.7 kg) M1 anchor which would be my choice for the R23.

PS: That said, the amount of chain you have is very important as well. We have 18 meters (60 ft) of 5/16” G4 chain which weights in at a pound per foot. I think 40-50 ft of 5/16” chain with the 17 pound Mantus M1 anchor would be a good combo for the R23 in everything in almost all weather and the vast majority of bottom conditions.
 
Hi Chris,

What scope do you use when setting the anchor? Are you anchoring in an area with tidal changes and is the anchor dragging on the high-tide?

You should aim for a scope of 7:1 during the high tide or more if there is strong current or wind. If you are setting the anchor at a low tide / light current your scope may not be enough when the tide changes.

I know I haven't answered your specific question but I hope this helps.
John
 
+1 to Rocna anchor (or Mantis, from what I've heard), and to adequate scope and chain. The sailing writer Larry Pardey recommends (for sailboats) to use at least 90' minimum chain + rode if at all possible. Or more when the scope calls for it.

As for dragging, I sleep much better when using the Anchor Pro app on my phone (be sure to enable it to stay on, and add a USB pack or 12v-USB plug to ensure adequate battery). Our Garmin chartplotter has a great anchor alarm feature, too -- with nice visual chart overlay -- but uses a lot of house battery overnight (more than I want to use, unless I'm very worried).
 
Lady Grey is an R-23, and we have been very happy with the 8KG Mantus, 30’ of chain, and 300’ of rode. We have never needed that much line, but after 6 visits to Desolation Sound with our Kent built Ranger 26’ sailboat, we like the security of having plenty of scope when you need it.
 
Thank you everyone for your help.. I'm going to look into Rocna and the Mantus anchors.
 
I heard from Mantus that they will be having a 20 or 25% sale on 1 April. I'll be ordering a second one then.
 
Also, its a little extreme, but I also upgraded to a Vesper Marine AIS. The AIS uses a very sensitive external GPS. The Vesper then will send that strong/accurate GPS signal to its WIFI network and their anchor alarm on my phone. Thus, no matter the weather, etc. my anchor alarm is accurate. I've used a few cellphone apps and very often, the GPS is weak down below decks and often gives me false alarms. I've had it go off so often, that I kept making the drag circle so large that when I actually did drag, I was closer to shore than I wanted.
An added benefit, unlike my Garmin AIS 600, the Vesper will share it's high sensitivity external GPS to all the items on the NEMA network. The factory Garmin 600 had an external GPS puck, but it ONLY worked for the Garmin AIS and did not share the signal or send that GPS to my Vesper drag alarm by WIFI.
Little expensive, but hey, I'm still working with an income.
 
Never talk anchors, politics or religion. :lol: Scope and chain are equally important. being on the east coast achieving 7:1 scope is easy enough. I use a Manson Supreme. It is very similar to Rocna and more reasonably priced. Whatever anchor you purchase make sure it will fit with your current configuration. Here is the Manson sizing chart. https://www.mansonanchors.com/files/1360_20160321230346-1458554626.pdf Ten years using mine in a wide variety of conditions and never dragged.
 
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