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Anchor Installation & Setup

  • Will the anchor fit my existing bow roller?

    Rocna anchors are designed to work with most standard bow rollers—especially those made for plough-style anchors with a similar shank profile.

    However, bow roller designs can vary by boat, so it’s important to check for proper clearance and fit. Features like adjustable rollers or longer trays can help ensure a smooth self-launch and retrieval.

    If you’re unsure, we recommend checking the dimensions of your roller or consulting your installer.  

  • Do I need a swivel?

    In most cases, no—if you’re not sure you need one, you probably don’t. A high-quality shackle is sufficient for most anchoring situations.

    Swivels are useful in specific cases, like:

    • If your chain often comes up twisted or brings the anchor up sideways
    • If you anchor in tidal areas with strong, consistent 360° swinging

    If you do choose to use a swivel, make sure it’s from a reputable brand, and avoid installing it directly on the anchor shank. Use a few links of chain in between to avoid lateral stress on the swivel.

    We are close to launching a Rocna Swivel —designed to meet the same high standards as our anchors. Stay tuned.

  • What size shackle do I need for my Rocna anchor?

    Your shackle should be sized to match the pin diameter that fits through your chain’s end link, and the body should fit cleanly through the Rocna anchor’s rode attachment point.

    In general:

    • Use a high-load galvanized bow shackle
    • Choose the largest pin size that fits through your chain
    • Avoid using two shackles unless absolutely necessary—Rocna anchors are designed to accept properly sized shackles directly

    For most setups, a galvanized, forged, tested shackle offers the best balance of strength, corrosion resistance, and value.  

    Choose from our selection of hot dipped galvanized shackles from Titan Marine Products. 

  • What scope do I need with my Rocna anchor?

    The scope is the ratio of the length of anchor rode (chain and/or rope) to the vertical distance from your bow roller to the seabed. For Rocna anchors, we recommend:

    • 3:1 for calm conditions (minimum)
    • 5:1 for normal anchoring
    • Up to 8:1 in strong winds or poor holding

    Beyond 8:1, there’s little added benefit—just more swinging room needed. The key is scope, not heavy chain. In fact, in strong conditions, the weight of the chain (catenary) loses most of its benefit as the rode goes bar-tight. Focus on deploying more rode and using a reliable anchor like Rocna.

    Use a snubber or nylon section to absorb shock, especially on smaller boats. 

  • What is the recommended chain rope setup?

    The ideal chain and rope setup depends on your boat size, anchoring conditions, and gear preferences. While the Rocna anchor performs exceptionally with a variety of configurations, here’s how to optimize your rode setup. 

    Titan Marine offers a premium 8-plait nylon rope and G43 high test galvanized chain rode, professionally spliced and calibrated for windlass systems. This setup balances strength, abrasion resistance, and ease of handling—making it suitable for most anchoring conditions.