{"product_id":"rig-tune-target-speed-log-pdf","title":"Rig Tune \u0026 Target Speed Log PDF — Instrument Calibration, Settings Matrix \u0026 Your Own Polar","description":"\u003cp style=\"font-size:1.05em;line-height:1.7;\"\u003e\u003cstrong\u003eNobody sells a boat speed that has never been checked against a measured run. A great many people sail to one.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eA log reading three per cent low makes every target you ever chase three per cent wrong, and you will spend a season blaming the sails. A masthead unit twisted four degrees will convince you the boat points better on one tack for as long as you own it. Both are two afternoons of work to fix, and almost nobody does them.\u003c\/p\u003e\n\n\u003cp\u003eSo this record puts calibration in Part II, before a single performance page. What comes after is a settings matrix in your own wind bands, twenty observation runs, and a polar grid that starts empty and fills up over a season.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#0A3F5C;border-left:4px solid #C5A059;border-radius:4px;padding:22px 24px;margin:26px 0;color:#F7F9FA;\"\u003e\n  \u003cp style=\"margin:0 0 4px;font-size:0.72em;letter-spacing:0.14em;text-transform:uppercase;color:#C5A059;font-weight:700;\"\u003eWhat you receive\u003c\/p\u003e\n  \u003cp style=\"margin:0 0 14px;font-size:1.25em;line-height:1.35;color:#FFFFFF;\"\u003eA seven-part record, calibration first\u003c\/p\u003e\n  \u003cul style=\"margin:0;padding-left:18px;line-height:1.75;color:#DCE6EC;\"\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA 24-line reference page\u003c\/strong\u003e for whatever your designer, class association or sailmaker specified — and a blank line where nothing was, which is itself a finding\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA 12-entry calibration register\u003c\/strong\u003e with a column for the value that was set \u003cem\u003ebefore\u003c\/em\u003e you changed it\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA settings matrix in ten wind bands you define yourself\u003c\/strong\u003e — backstay, cap and lower turns, jib lead, halyard, traveller, each row with a reference you quote in the log\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003e20 observation runs\u003c\/strong\u003e recording true wind, boat speed, VMG, heel and the setting reference in force\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003eA 72-cell polar grid\u003c\/strong\u003e — twelve angles by six wind bands, filled with speeds you have actually achieved\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color:#FFFFFF;\"\u003e6 calculation models\u003c\/strong\u003e, each with its own working table, plus a 16-line session debrief\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eThere is no polar in this document\u003c\/h3\u003e\n\u003cp\u003eA designer's polar is a promise made about a bare hull in a towing tank — before your sails, your bottom, your crew weight and your ground tackle. It is a useful sanity check and a terrible target.\u003c\/p\u003e\n\u003cp\u003eThe grid in Part IV starts empty. By the end of a season it holds the only figures you actually have to beat: the ones you have already hit, on your boat, with your crew. Model P5 compares today against that, not against somebody's brochure.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#F7F9FA;border:1px solid #E1E8EC;border-left:4px solid #A2803C;border-radius:4px;padding:20px 22px;margin:26px 0;\"\u003e\n  \u003cp style=\"margin:0 0 6px;color:#0A3F5C;font-weight:700;\"\u003eTwo models are geometry. Four are your own measurements.\u003c\/p\u003e\n  \u003cp style=\"margin:0;line-height:1.7;\"\u003eP3 (true wind from apparent) and P4 (velocity made good) hold for any vessel afloat — they are trigonometry, not performance claims. Everything else in the record is a figure you measured on your own boat or transcribed from your own documentation. No target speed, no polar, no tuning setting and no crossover point is published anywhere in these 23 pages.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eThe model that settles arguments\u003c\/h3\u003e\n\u003cp\u003eP6 tests a setting change back to back in matched conditions, with the order swapped on the second pair so a wind shift cannot sell you a setting that was never faster. Most settings differences are smaller than the noise. This is how you find out which ones are not — and it will cost you some cherished beliefs.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eOn a boat with no tuning guide, this becomes the tuning guide\u003c\/h3\u003e\n\u003cp\u003eOutside one-design classes, most boats have no published tune at all. The matrix in Part III fills that gap with something better than a generic guide: ten bands you defined, and what your rig is actually set to in each, referenced from every run in the log.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eWho it is for\u003c\/h3\u003e\n\u003cul style=\"line-height:1.75;\"\u003e\n  \u003cli\u003eRacing crews who suspect their instruments and have never proved it either way\u003c\/li\u003e\n  \u003cli\u003eOwners of boats with no class tuning guide, building one from scratch\u003c\/li\u003e\n  \u003cli\u003eAnyone who has bought a fast sail and cannot tell whether it made a difference\u003c\/li\u003e\n  \u003cli\u003eCruisers who want honest passage planning numbers rather than optimistic ones\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eHow it relates to the Standing Rigging Record\u003c\/h3\u003e\n\u003cp\u003eThe Standing Rigging Record holds the mast up and tracks its tension and age. This one records what the rig is \u003cem\u003eset to\u003c\/em\u003e and what the boat does as a result. Together with the Sail Inventory they are the complete performance history of everything above deck — the half of a boat that no single afternoon's inspection can reconstruct.\u003c\/p\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eTechnical specification\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:0.95em;margin:12px 0 4px;\"\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;width:42%;\"\u003eProduct ID\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eAML-RIG-2026-03\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eExtent\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e23 pages · 7 parts · 6 calculation models\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eRegister lines\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e188 across reference, calibration, settings, observation, polar and debrief\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eInteractivity\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003e845 live PDF form fields — 24 tick boxes and 821 entry fields\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eFormats included\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eA4 and US Letter, both fillable and print-ready, 23 pages each\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eBoats\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eAny sailing vessel — one-design, handicap or cruising, no boat-specific data\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eUnits\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eUnit-neutral — knots or metric, you set them and record which\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;color:#0A3F5C;font-weight:600;\"\u003eOffline\u003c\/td\u003e\n\u003ctd style=\"padding:9px 0;border-bottom:1px solid #E1E8EC;\"\u003eNo app, no account, no connection required once downloaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"color:#0A3F5C;margin:30px 0 8px;\"\u003eWhat it is not\u003c\/h3\u003e\n\u003cp\u003eThis document records, structures and compares figures that you supply. It publishes no target speed, no polar, no tuning setting and no crossover point, and it reaches no conclusion about any boat.\u003c\/p\u003e\n\u003cp\u003eSailing to a performance target is a matter of judgement about the conditions, the sea state and the safety of your crew. No number in a document can make that judgement for the person on the helm.\u003c\/p\u003e\n\n\u003cp style=\"margin-top:26px;\"\u003e\u003cstrong style=\"color:#0A3F5C;\"\u003eInstant download.\u003c\/strong\u003e Your links appear on screen the moment payment clears, and arrive by email within a minute. They do not expire.\u003c\/p\u003e\n\n\u003cp style=\"font-size:0.9em;color:#5C6B75;line-height:1.65;margin-top:22px;border-top:1px solid #E1E8EC;padding-top:16px;\"\u003e\u003cem\u003e2026 Captain's Edition · Revision 1.0 · AML-RIG-2026-03. Apex Marine Labs designs the organisational process behind good seamanship. Our documents record and organise; they do not replace a certified marine survey, a naval architect, or a qualified sailmaker.\u003c\/em\u003e\u003c\/p\u003e","brand":"Apex Marine Labs","offers":[{"title":"Default Title","offer_id":56016668033192,"sku":"AML-RIG-2026-03","price":97.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/1161\/2072\/files\/apex-rig-tune-target-speed-01-cover.webp?v=1789771067","url":"https:\/\/apexmarinelabs.com\/products\/rig-tune-target-speed-log-pdf","provider":"Apex Marine Labs","version":"1.0","type":"link"}