{"id":47917,"date":"2026-01-15T22:40:32","date_gmt":"2026-01-15T22:40:32","guid":{"rendered":"https:\/\/maritimehub.co.uk\/?p=47917"},"modified":"2026-01-15T22:40:32","modified_gmt":"2026-01-15T22:40:32","slug":"visual-fixes","status":"publish","type":"post","link":"https:\/\/maritimehub.co.uk\/visual-fixes\/","title":{"rendered":"Visual Fixes"},"content":{"rendered":"\n

Finding where you are using what you can see \u2014 the foundation of coastal navigation

Contents<\/p>\n\n\n\n

Use the links below to jump to any section:<\/p>\n\n\n\n

    \n
  1. What a Visual Fix Really Is<\/li>\n\n\n\n
  2. Why Visual Fixes Still Matter<\/li>\n\n\n\n
  3. What You Need Before You Can Take a Fix<\/li>\n\n\n\n
  4. Choosing Suitable Objects for a Visual Fix<\/li>\n\n\n\n
  5. The Three-Bearing Fix (Conceptual Overview)<\/li>\n\n\n\n
  6. Two-Bearing and Single-Bearing Fixes<\/li>\n\n\n\n
  7. Accuracy, Geometry, and Fix Quality<\/li>\n\n\n\n
  8. Fix Timing and Vessel Movement<\/li>\n\n\n\n
  9. When a Visual Fix Is Not Reliable<\/li>\n\n\n\n
  10. Common Civilian Mistakes<\/li>\n\n\n\n
  11. Professional Habits for Reliable Visual Fixes<\/li>\n<\/ol>\n\n\n\n
    \n\n\n\n

    1. What a Visual Fix Really Is<\/h2>\n\n\n\n

    A visual fix<\/strong> is a confirmed position on the chart, determined by observing real, physical objects<\/strong> outside the ship and relating them to charted information.<\/p>\n\n\n\n

    It answers one question only:<\/p>\n\n\n\n

    \n

    \u201cWhere is the ship right now?\u201d<\/em><\/p>\n<\/blockquote>\n\n\n\n

    A fix is not an estimate.
    It is not a guess.
    It is not \u201croughly here\u201d.<\/p>\n\n\n\n

    A fix is a statement of position with confidence<\/strong>.<\/p>\n\n\n\n

    \n\n\n\n

    2. Why Visual Fixes Still Matter<\/h2>\n\n\n\n

    Visual fixing predates radar, GPS, and ECDIS by centuries \u2014 and it still survives because it works when everything else fails.<\/p>\n\n\n\n

    Visual fixes are:<\/p>\n\n\n\n

      \n
    • independent of electronics<\/li>\n\n\n\n
    • immune to signal loss<\/li>\n\n\n\n
    • immediately intuitive<\/li>\n\n\n\n
    • excellent at detecting drift and error<\/li>\n<\/ul>\n\n\n\n

      Many modern accidents occur in sight of land<\/strong>, where visual fixes were available but not used.<\/p>\n\n\n\n

      Professional navigators never abandon visual fixing just because electronics are working.<\/p>\n\n\n\n

      They use it to verify reality<\/strong>.<\/p>\n\n\n\n

      \n\n\n\n

      3. What You Need Before You Can Take a Fix<\/h2>\n\n\n\n

      Before taking a visual fix, three things must already be true:<\/p>\n\n\n\n

      You must know what you are looking at<\/strong>.
      You must know where it is on the chart<\/strong>.
      You must know how to relate the two<\/strong>.<\/p>\n\n\n\n

      This sounds obvious, but most fixing errors happen because one of these steps is assumed instead of confirmed.<\/p>\n\n\n\n

      A lighthouse misidentified is worse than no lighthouse at all.<\/p>\n\n\n\n

      \n\n\n\n

      4. Choosing Suitable Objects for a Visual Fix<\/h2>\n\n\n\n

      Not everything you can see is suitable for fixing.<\/p>\n\n\n\n

      Good fixing objects are:<\/p>\n\n\n\n

        \n
      • clearly charted<\/li>\n\n\n\n
      • fixed to the land<\/li>\n\n\n\n
      • easily identifiable<\/li>\n\n\n\n
      • well separated in bearing<\/li>\n<\/ul>\n\n\n\n

        Poor fixing objects include moving vessels, ambiguous shore features, or anything that \u201cmight be that\u201d.<\/p>\n\n\n\n

        When in doubt, do not force a fix.
        Wait for better geometry.<\/p>\n\n\n\n

        \n\n\n\n

        5. The Three-Bearing Fix (Conceptual Overview)<\/h2>\n\n\n\n

        The classic visual fix uses three bearings<\/strong> taken to three separate charted objects.<\/p>\n\n\n\n

        Each bearing defines a line of position<\/strong> \u2014 a line along which the ship must lie.<\/p>\n\n\n\n

        Where three such lines intersect is the ship\u2019s position.<\/p>\n\n\n\n

        The value of three bearings is not precision \u2014 it is confirmation<\/strong>.
        If all three meet cleanly, confidence is high.
        If they form a triangle, something is wrong.<\/p>\n\n\n\n

        That triangle is not failure.
        It is information.<\/p>\n\n\n\n

        \n\n\n\n

        6. Two-Bearing and Single-Bearing Fixes<\/h2>\n\n\n\n

        In reality, three perfect objects are not always available.<\/p>\n\n\n\n

        Two bearings can still give a fix, but with reduced confidence.
        A single bearing gives position information only when combined with something else \u2014 such as a range, transit, or depth contour.<\/p>\n\n\n\n

        Professional navigation is about using what is available<\/strong>, not waiting for perfection.<\/p>\n\n\n\n

        \n\n\n\n

        7. Accuracy, Geometry, and Fix Quality<\/h2>\n\n\n\n

        Not all fixes are equal.<\/p>\n\n\n\n

        A good fix depends on geometry<\/strong>, not effort.<\/p>\n\n\n\n

        Bearings taken to objects that are too close together produce poor fixes.
        Bearings taken nearly ahead or astern are less reliable than those abeam.<\/p>\n\n\n\n

        The best fixes come from objects spaced roughly evenly around the horizon.<\/p>\n\n\n\n

        This is why fix quality improves with experience \u2014 the eye learns what \u201clooks right\u201d.<\/p>\n\n\n\n

        \n\n\n\n

        8. Fix Timing and Vessel Movement<\/h2>\n\n\n\n

        A ship moves continuously.<\/p>\n\n\n\n

        This means:<\/p>\n\n\n\n

          \n
        • bearings must be taken quickly<\/li>\n\n\n\n
        • time must be recorded<\/li>\n\n\n\n
        • position must reflect where the ship was at that moment<\/li>\n<\/ul>\n\n\n\n

          If bearings are taken slowly, the ship will have moved between observations and the fix will smear.<\/p>\n\n\n\n

          This is why visual fixing is a bridge team activity<\/strong>, not a solo task when workload is high.<\/p>\n\n\n\n

          \n\n\n\n

          9. When a Visual Fix Is Not Reliable<\/h2>\n\n\n\n

          Visual fixes lose reliability when:<\/p>\n\n\n\n

            \n
          • visibility is poor<\/li>\n\n\n\n
          • background lighting hides landmarks<\/li>\n\n\n\n
          • sun glare obscures detail<\/li>\n\n\n\n
          • objects are misidentified<\/li>\n\n\n\n
          • the ship is turning rapidly<\/li>\n<\/ul>\n\n\n\n

            In these cases, forcing a fix creates false confidence.<\/p>\n\n\n\n

            A professional navigator knows when not<\/strong> to plot.<\/p>\n\n\n\n

            \n\n\n\n

            10. Common Civilian Mistakes<\/h2>\n\n\n\n

            Civilians new to navigation commonly:<\/p>\n\n\n\n

              \n
            • fix on whatever is easiest to see, not what is best<\/li>\n\n\n\n
            • assume landmarks are obvious when they are not<\/li>\n\n\n\n
            • ignore time and movement<\/li>\n\n\n\n
            • trust a \u201cneat\u201d fix more than a believable one<\/li>\n<\/ul>\n\n\n\n

              Neatness does not equal accuracy.<\/p>\n\n\n\n

              \n\n\n\n

              11. Professional Habits for Reliable Visual Fixes<\/h2>\n\n\n\n

              Experienced watchkeepers develop habits that prevent error.<\/p>\n\n\n\n

              They constantly compare:<\/p>\n\n\n\n

                \n
              • visual bearings<\/li>\n\n\n\n
              • ship\u2019s heading<\/li>\n\n\n\n
              • expected track<\/li>\n\n\n\n
              • charted dangers<\/li>\n<\/ul>\n\n\n\n

                They treat fixes as checks<\/strong>, not answers.<\/p>\n\n\n\n

                If a fix contradicts expectation, they investigate immediately \u2014 they do not adjust the plan to make the fix \u201cfit\u201d.<\/p>\n\n\n\n

                \n\n\n\n

                Closing Perspective<\/h2>\n\n\n\n

                Visual fixing is not an old skill.
                It is a human skill<\/strong>.<\/p>\n\n\n\n

                It teaches spatial awareness, judgement, and humility \u2014 qualities that no electronic system can replace.<\/p>\n\n\n\n

                Everything else in Terrestrial & Coastal Navigation builds on this.<\/p>\n\n\n\n

                \n\n\n\n

                Tags<\/h2>\n\n\n\n

                visual navigation \u00b7 coastal navigation \u00b7 position fixing \u00b7 bridge watchkeeping \u00b7 chartwork fundamentals \u00b7 maritime training
                <\/p>\n","protected":false},"excerpt":{"rendered":"

                Finding where you are using what you can see \u2014 the foundation of coastal navigation Contents Use the links below to jump to any section: 1. What a Visual Fix Really Is A visual fix is a confirmed position on the chart, determined by observing real, physical objects outside the ship and relating them to […]<\/p>\n","protected":false},"author":199,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"fifu_image_url":"","fifu_image_alt":"","c2c-post-author-ip":"","footnotes":""},"categories":[10,1,14],"tags":[8859],"class_list":["post-47917","post","type-post","status-publish","format-standard","hentry","category-bridge","category-latest","category-on-deck","tag-8859"],"acf":[],"_links":{"self":[{"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/posts\/47917","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/users\/199"}],"replies":[{"embeddable":true,"href":"https:\/\/maritimehub.co.uk\/?rest_route=%2Fwp%2Fv2%2Fcomments&post=47917"}],"version-history":[{"count":1,"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/posts\/47917\/revisions"}],"predecessor-version":[{"id":47918,"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/posts\/47917\/revisions\/47918"}],"wp:attachment":[{"href":"https:\/\/maritimehub.co.uk\/?rest_route=%2Fwp%2Fv2%2Fmedia&parent=47917"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/maritimehub.co.uk\/?rest_route=%2Fwp%2Fv2%2Fcategories&post=47917"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/maritimehub.co.uk\/?rest_route=%2Fwp%2Fv2%2Ftags&post=47917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}