Table of Contents
What is a spade anchor?
Spade Anchors are hassle-free boat anchors that require no special techniques or mooring lines: simply sit back and let their self-launching design go to work. Their concave shaped design digs deep into the sea floor, and once they’ve made contact with the sea bottom, these anchors set into place and will not budge.
How do you size a boat anchor?
Use a ratio of 7:1, or 7 feet of line for every foot of anticipated water depth. For example, you would need 70 feet of anchor line in 10 feet of water.
How heavy of an anchor do I need?
As a general rule, a holding power of 90 pounds is sufficient for safely anchoring a 20′ boat in winds up to 20 mph. For the same wind speed a holding power of 125 pounds is adequate for a 25′ boat.
How heavy of an anchor do I need for a 20 foot boat?
Holding power is formulated based on environmental factors, like wind speed. As a general rule, a holding power of 90 pounds is sufficient for safely anchoring a 20′ boat in winds up to 20 mph.
How do you size an anchor?
Will a Rocna or Vulcan anchor fit my boat?
Measurements important to the fitting of the anchor on a bow roller are reproduced on this sheet. Using these drawings and a tape measure, many boaters can easily determine that a Rocna or Vulcan will fit their boat. A 2D side-profile of any size anchor may be produced by using the below full scale patterns.
Is there a recommended size for the Rocna 110?
We do not provide standard recommendations for boats larger than those for which the Rocna 110 (243 lb) would be the recommended size. This is because of increasing complexities of the factors involved.
Can I get a CAD file of the Rocna anchor?
We are able to supply naval architects or boat builders with accurate CAD files of all Rocna and Vulcan models to support the proper integration of the anchor into a boat’s ground tackle system. Contact us, and with the execution of a simple terms of use agreement these CAD files may be made available.
What is the Rocna knowledge base?
The Rocna Knowledge Base features a large and ever-growing collection of “boat fit cases”, with photos and other information, under Rocna bow compatibility. Popular production boats are covered, and examples of other owners of your boat type successfully fitting a Rocna or Vulcan will allow you to invest with confidence.