VViCKiD Posted February 5, 2014 Share Posted February 5, 2014 Hi guys, Can anyone recommend a sand anchor size ? I have a haines 530 haines fibreglass boat. Thanks in advance! Link to comment Share on other sites More sharing options...
Fab1 Posted February 5, 2014 Share Posted February 5, 2014 12lb anchor 2.5 meter 8 mm s/l chain 100 m of 10 or 12mm silver rope. Let enough scope out to suit conditions and you will have no dramas. Cheers. Sent from my GT-I8730T using Tapatalk Link to comment Share on other sites More sharing options...
Geoff Posted February 5, 2014 Share Posted February 5, 2014 According to the book , 10lb is the recomonded size for your boat along with a meter or so of chain but if you want some safety margin then go with Fab 1 suggestion. Geoff Link to comment Share on other sites More sharing options...
VViCKiD Posted February 5, 2014 Author Share Posted February 5, 2014 The reason I'm asking is I have a 12 lb anchor with 4m of 6mm chain. But my boat kept drifting. Should I add more chain to this setup or should I get a larger anchor? Thx in advance! Link to comment Share on other sites More sharing options...
Fab1 Posted February 5, 2014 Share Posted February 5, 2014 What you have should be plenty,If you want you can upgrade the chain to whatever thickness you like eg:10mm but try letting out more rode first. It sounds like your not letting out enough to suit the conditions causing the flukes not to bite in to the seabed. The more Wind,Current,Swell,Depth The more rode you need to let out to get the correct lay on the rode/chain to allow the anchor to set correctly. Link to comment Share on other sites More sharing options...
VViCKiD Posted February 5, 2014 Author Share Posted February 5, 2014 Thanks Fab1. Ok I'll test it out again. I think the previous day was windy. I'll try let out more rope before making any purchases Cheers ! Link to comment Share on other sites More sharing options...
Fab1 Posted February 5, 2014 Share Posted February 5, 2014 (edited) No worries mate,another thing Is always lower your anchor over the side smoothly, don,t just throw it over in a big lump as the chain/rope can tangle around the anchor which will prevent the flukes from digging in. Cheers. Edited February 5, 2014 by Fab1 Link to comment Share on other sites More sharing options...
cameldownunder Posted February 5, 2014 Share Posted February 5, 2014 When the anchot is down, with a good amount of chain/rope, I pull it in the sand by reversing slightly. Link to comment Share on other sites More sharing options...
Geoff Posted February 6, 2014 Share Posted February 6, 2014 Thanks Fab1. Ok I'll test it out again. I think the previous day was windy. I'll try let out more rope before making any purchases Cheers ! The rule of thumb is 3 times the depth. This can vary depending on the conditions , on calm days 2 times may be sufficent but 2 - 3 is the normal practice. 6.0mt of chain is heaps so suggest this is not increased. I have a 4.9mt boat with a 10lb anchor with only 1.0mt of chain but use the 3 times rule & never have a problem. Geoff Geoff Link to comment Share on other sites More sharing options...
VViCKiD Posted February 6, 2014 Author Share Posted February 6, 2014 Does that rule only apply to sand ? I normally just use 2 times when using my reef anchor. Link to comment Share on other sites More sharing options...
Geoff Posted February 6, 2014 Share Posted February 6, 2014 Does that rule only apply to sand ? I normally just use 2 times when using my reef anchor. As reef anchors catch on or lock into a crevase or hole in the rocks , depending on sea conditions , 2 time is normally enough. Sand being softer & the need for the anchor to remain flat , longer rope is better so the rope / chain act as a shock absorber as the boat moves up & down but the anchor is not being disturbed. Geoff Link to comment Share on other sites More sharing options...
wish2fish Posted February 18, 2014 Share Posted February 18, 2014 I had the same problem. Research revealed that it is recommended to have a length of chain the same length as the vessel. I did this and haven't had a problem since. True that the longer rope you use, the better too. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Berleyguts Posted February 18, 2014 Share Posted February 18, 2014 I had the same problem. Research revealed that it is recommended to have a length of chain the same length as the vessel. I did this and haven't had a problem since. True that the longer rope you use, the better too. Sent from my iPhone using Tapatalk I read that the chain needed to be the same length as the vessel, too, so swapped the metre or so that came with my new boat for 4.5 metres. It's a pain in the proverbial sometimes but I'm sure it helps hold better. Baz Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
VViCKiD Posted February 18, 2014 Author Share Posted February 18, 2014 I tried letting a bit more chain out and it lessened the problem. But we still managed to drift about 50m or so over 3 hours. Perhaps I will add another meter or so of chain and connect them with a shackle. Link to comment Share on other sites More sharing options...
Guest Aussie007 Posted February 19, 2014 Share Posted February 19, 2014 I tried letting a bit more chain out and it lessened the problem. But we still managed to drift about 50m or so over 3 hours. Perhaps I will add another meter or so of chain and connect them with a shackle. the length of chain helps greatly as boats pass u by creating small waves it tosses your boat about and slaps the chain on the sea floor the longer the chain the better as it will only lift so much of the chain, when u have a short chain theres not much to lift before it pulls the anchor out of the sea floor the chain does all the work my little tinny weighs bugger all it had a short length of chain from memory around 1-1.2m in length and it just wouldnt hold bottom at the hawkesbury, i lengthen the chain and now it doesnt budge a mate has the quintrex bowrider 5.3m we tried anchoring same place in the hawkesbury it wouldnt hold so my mate who owns the boat works in a nut and bolt factory and purchased 5 meters of high tensile chain worked a bloody treat even on the most windiest days she doesnt budge but i s... u not that chain is a back breaker to pull up lol its gotta weigh around 40-50kg adding the original chain and anchor plus add some mud and it takes 2 people to pull it up fun times the only down side is chain isnt cheap and anchors are often lost so it can be costly Link to comment Share on other sites More sharing options...
VViCKiD Posted February 19, 2014 Author Share Posted February 19, 2014 U can buy anchor retrievers for that problem. I bought one on ebay. I hope the d-shackle for my extra chain won't get caught on it Link to comment Share on other sites More sharing options...
Nolongeramember Posted February 19, 2014 Share Posted February 19, 2014 I tried letting a bit more chain out and it lessened the problem. But we still managed to drift about 50m or so over 3 hours. Perhaps I will add another meter or so of chain and connect them with a shackle. Your chain is not the problem. Its all in the technique used that determines the hold. Before lowering your anchor, hold the chain just above it and make sure the ring and whatever else is all in the same position you want it to be when the anchor is set at the bottom. Lower the anchor with slight tension on the rope so it stays in the correct position until it hits the bottom. The way anchors work, the more rope you let out the stronger the hold. Think about the angle the rope is pulling on the anchor as its on the bottom. With not much more rope out than the water depth, you are basically pulling the anchor straight up. Let out heaps... Link to comment Share on other sites More sharing options...
VViCKiD Posted February 19, 2014 Author Share Posted February 19, 2014 thanks Roylo.. yeh i normally just put it over the side and release the chain. I'll let out alot more chain. cheers ! Link to comment Share on other sites More sharing options...
BWV Posted February 20, 2014 Share Posted February 20, 2014 Yes, the chain length should be a minimum of the LOA of the vessel it is on. As for how much rode to let out for the anchor and chain to work as intended depends on the conditions. In calm conditions 3 x the depth is a minimum on average it should be 3-5x the depth. In moderate conditions 5-7 x the depth. In rough conditions 7- " as much as you have or need". You can never have to much rode out if the conditions aren't great. This is a general rule of thumb for all anchors in all types of seabeads. Your anchor chain should never lift off the sea bead for its entire length, if it does you haven't let enough rode out. Only the first 10-20% max, of the chain should. The more rode you have out the greater the holding power of the anchor and chain. The scope is very important if you think about the angle the anchor pulls into the sea bed it's either going to bury it self and hold you in position or if the scope is to great you"ll continually break the anchor out of the sea floor. Don't throw the anchor over the side, lower in in a controlled manner and make sure it doesn't end up in a tangle heap on the bottom. Make sure it's stretched out and then the vessel is bought up on on the anchor. A good tradesman never blames his tools, this can be applied to most anchoring problems too. Link to comment Share on other sites More sharing options...
Paikea Posted February 20, 2014 Share Posted February 20, 2014 (edited) What type of Sand Anchor are you using? There is a vast difference in the holding power of the full range of anchors. As to the length of scope I use a lot more than two times the depth. Cheers Paikea Edited February 20, 2014 by Paikea Link to comment Share on other sites More sharing options...
VViCKiD Posted February 21, 2014 Author Share Posted February 21, 2014 I'm using a sand anchor (Sanforth type) Link to comment Share on other sites More sharing options...
Guest Aussie007 Posted February 21, 2014 Share Posted February 21, 2014 plenty of videos on youtube including aussie big name shops suggesting a chain length of your boat and rope 4 times the depth Link to comment Share on other sites More sharing options...
VViCKiD Posted February 21, 2014 Author Share Posted February 21, 2014 Thx gazza. Yeh will try extra length rope with more chain to cover all bases Chees Link to comment Share on other sites More sharing options...
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