Anchoring & Mooring

PS tested tandem anchoring rigs aboard a PDQ 32. The rig shown here, missing a shackle and a chain leader, was used for testing purposes only.

Tandem Anchoring

Will 2 anchors on 1 rode increase holding?

Recent tests on a miserable holding bottom in the Chesapeake Bay (see PS, February 2015 online) showed that conventionally sized anchors just don’t hold in a soupy bottom. Those that can—pivoting fluke anchors—aren’t always the easiest to set, and security during wind shifts is much debated. Setting a second anchor is an option—one we’ve studied previously (see “Tropical Storm Dos and Don’ts,” PS November 2011 online)—but tandem rigs intrigued us. Could two anchors on a single rode provide more secure holding in tricky bottoms, and if so, what is the ideal arrangement? We were particularly interested in single-line tandem rigs (which Rocna designer Peter Smith referred to in his report) and V-tandem rigs (which several PS contributors have had success with).

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