I agree with Paul and the other posts.
Your primary concern should be the type of anchor you use. We have "transitioned" all of our plow anchors (CQR, Delta
, etc) for use as lawn ornaments, as they all perform as advertised: they plow. We also removed an unused huge Luke from our boat which looks cool in front of our house. We now have a 40kg Rocna and a 35kg Ultra. These modern spade type anchors dig into any type of bottom, set quickly, and hold very well. We also have a Fortress
, which has proven itself in mud time and again.
Your primary anchor should be sized to hold your boat in just about anything. For peace of mind you can then go for a tandem rig attaching the second anchor to the crown of your primary with a length of chain. In a hurricane situation the best you can do is haul your boat or try and hide, and preferably tie your boat with a spiderweb of ropes and anchors. (BoatUS has some good and sound advice on this).
Regarding the rode, chain (strong and heavy) is indeed good. More important, of course is that you have sufficient scope
for where you will be anchoring
- more is always better. If you do use a chain rode, it is important you use a rope snubber - one that will stretch and absorbe the shock load of your boat pitching in waves. Remember that the chain will not stretch, and in a storm it will be bar taut. We have seen this on numerous occasions. Without the elasticity of the snubber your boat's motion will be directly applied to the anchor, potentially pulling it out of the bottom - that is if your deck hardware
does not fail first. We have an all chain rode with a snubber as our primary and several lengths of heavy nylon rode down below just in case.
Finally, make sure you have really good chafe protection on your rope rode or snubber - even if you pass this over your bow roller. Without this you may as well kiss your boat goodbye.
I hope this helps you in your decision making.