⚓ RC BOAT DRIFTING —
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WATCH
0 ft
RC boat is drifting from its locked anchor position.
🔓 To reset: toggle GPS lock OFF → re-anchor → toggle GPS lock ON once settled.

SLSC Course Setup Suite

Race Committee & Mark Set Coordination (All speeds in MPH)
RC Station Setup Mode

📋 SLSC Proper Operation Sequence Guide

[-] Collapse
Step 1: Define Location, Fleet, Course & Wind (Course Setup Screen)
  1. Select Committee Boat Location under STEP 1. If using "Use Live Device GPS", coordinates will stream automatically; click ⚓ Click to Lock GPS Anchor Position to freeze your anchored position and start the drift monitor. If using "Enter Coordinates Manually", type your coordinates directly. [Sim Mode] Select a preset location (Mid Lake, North, or South) to run the simulator.
  2. Select the Longest Boat in Fleet Race under STEP 2 (critical for line and course lengths).
  3. Select the Course Configuration under STEP 3.
  4. Enter the True Wind Direction under STEP 4 and True Wind Speed under STEP 5.
Step 2: Configure Line Length, Skew & Marks (Right Column)
  1. Set starting line length and skew angle/method to establish the starting gate.
  2. Set the windward mark offset distance and skew angle/method.
  3. For courses with gates (L1/L2-Gate): Set the leeward gate separation distance and skew angle/method.
  4. For courses with triangles (T1, T2, M1, M2, G, F, O): Select the gybe mark angle.
    ⚠️ Important Note: You must consider **peak wind gusts**, not just average wind speed, when choosing the gybe angle to prevent dangerous jibing loads and ensure stable, high-speed planing.
    Wind/Gust Speed Recommended Gybe Angle
    Light (<8 MPH) 90° (Wide Angle for reaches)
    Moderate (8-14 MPH) 105° (Intermediate Angle)
    Heavy/Gusty (15+ MPH) 120° (Shallow Angle for planing)
Step 3: Handoff & Export to Mark Set Boats (Course Setup Screen)
  1. Enter cellphone numbers and send the course configuration link under STEP 6.
  2. [Sim Mode] Alternatively, click Preview in Navigator to open the navigator app, or click Copy Navigator Link to test the layout in the simulator.
Step 4: Navigate to Buoys (Navigator Screen)
  1. Sync or load the course coordinates. (This is done automatically if opened from the Setup Link, or you can paste the coordinates text block).
  2. Select the active buoy to navigate to from the Active Navigation Target menu. (Note: A target mark must be selected before navigating. [Sim Mode] A target mark must be selected before starting the simulator).
  3. Select the navigation mode: **Direct** or **Downwind Approach** (recommended for approaching all Marks from downwind to be easier to hold position when setting the mark).
  4. Start GPS tracking to receive steering angles and distance to the mark. [Sim Mode] Or, click Start Simulator to test-run the boat on the map. Boat speed can be manually entered but if too fast it will not function correctly.

① RC Positioning, Wind Conditions and Course Length Setup

All Cells With Green Text are Calculated Cells.

Course length, Starting Line Length, Start Line Skew, Offset Mark Distance, Leeward Gate Separation, Portsmouth Target Finish Times, and Anchoring Scope calculations are all driven by this fleet selection.
* Calculated based on boat selection in Section 2

⚓ RC on Station Anchoring Assist and Drift Manager With Drift Warning

🔄 Heavy Swing Mode
Widens alarm zone for large swing arcs. Auto-resets when GPS is unlocked.

Note: Depth is approximate and based on a crappy lake bottom contour map. Anchor scope will change based on wind speed conditions. Calculated, not user editable.

Drift Alarm & Warning Sequence: Once device GPS is locked, the app monitors the downwind component of drift against the expected swing zone:
• Watch (15 ft beyond zone): Early warning — single ping every 5 sec. Yellow popup.
• Alert (30 ft beyond zone): Deploy additional rode now — double beep every 5 sec. Orange popup.
• Critical (50 ft beyond zone): Anchor dragging — continuous siren. Red popup. Re-fires every 50 ft.
• False alarms? If Watch fires repeatedly, confirm True Wind Direction is current. If the boat is swinging unusually wide, enable Heavy Swing Mode above.
• Silencing & Resetting: Tap Acknowledge on the popup to silence. Toggle GPS lock OFF, re-anchor, toggle back ON to establish a new baseline.

📋 Course Specs & Mark Coordinates

📐 Course Specifications

📍 Mark GPS Coordinates

STEP 6 MSB Handoff & Texting (Send Course Info)

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🗺️ Course Map Layout

④ Mark Set Direction Finder

000° @ 0.00 Miles
Time to target: 0m 0s (at 6 MPH)
💡
Approach Tip: Approach the mark set location from downwind to make holding location position easier.
⛵ RC Boat Drift Simulator

What it does: The simulator places a virtual RC Boat (Committee Boat) (🛥️) on the map roughly 0.125 miles from the selected target mark and drives it toward that mark at the speed you set below. When it arrives, it enters a 60-second drift phase where the boat drifts downwind at 1 ft/sec to simulate wind pushing an anchored boat off position. Watch the RC Drift Monitor field above — it will colour-shift from green → yellow → orange → red and trigger the audio siren alarm when the simulated drift reaches 50 ft.

How to use: Set a wind direction (1.3) and lock or select a course, then choose the target mark above. Set the simulator boat speed below, then press Start Simulator. Use the live metrics panel to monitor progress. Press Stop Simulator at any time to reset.

⚠️ Sequence Alert Warning

📲 SMS Handoff Status

ℹ️ Help Guide

⚓ Anchor Scope Guidelines

Anchor scope (the ratio of anchor rode length to vertical depth) is critical to maintaining a horizontal pull on the anchor. As wind speed increases, a higher scope is required to prevent the anchor from breaking out of the lakebed.

Wind Speed (MPH) Scope Ratio Anchoring Context / Description
< 10 MPH 5:1 Light air — boat holds well on station at baseline scope.
10 - 14 MPH 7:1 Building breeze — danger transition zone. Deploy additional rode now.
≥ 15 MPH 8:1 Heavy air — deploy maximum available rode (~300 ft capacity).

Note: These scope recommendations are calibrated for this specific RC boat (26 ft pontoon, high windage, ~300 ft max rode). Standard references such as Chapman Piloting & Seamanship recommend 5:1–7:1 for moderate conditions and 10:1+ for heavy air — this boat's high windage and pendulum swing behavior requires the transition to heavier scope to begin earlier (10 MPH) than standard tables suggest.

⚖️ RRS & PRO Course Recommendations

Race course geometries, gate separations, and line lengths are calculated according to guidelines set by US Sailing and World Sailing. The rules ensure fair competition and safe maneuvering for all boats under the Racing Rules of Sailing (RRS).

1. Starting Line Length & Spacing

Recommendation: Standard starting line length is calculated as: Length = (Number of Boats in Largest Start) × (Longest Hull Length) × Multiplier. The multiplier defaults to 1.5×.
PRO Guide Reference: US Sailing Principal Race Officer (PRO) Guide - Ch. 7 (The Starting Line) / World Sailing Race Management Manual - Section E3.1. It recommends a 1.25× to 1.5× multiplier under standard conditions, increasing to 1.5×–2.0× in heavy air or rough seas.

2. Starting Line Skew & Bias

Recommendation: A standard starting line is set square (90°) to the average wind direction. However, PROs often set a slight 5° to 10° windward bias (pin end favored) to counteract the natural tendency of boats to crowd the Race Committee boat end and ensure starts are spread evenly.
PRO Guide Reference: US Sailing Race Management Handbook - Ch. 8 (Laying the Starting Line) / World Sailing Race Management Manual - Section E3.2.

3. Windward Offset Mark Separation

Recommendation: Offset (spacer) marks are set 90° to the windward leg, typically 7 to 10 boat lengths (approx. 50–100m) away from the windward mark. This allows spinnaker preparation and minimizes congestion/collisions as boats round the mark under RRS Rule 18 (Mark-Room).
PRO Guide Reference: US Sailing Principal Race Officer (PRO) Guide - Course Configurations & Layouts.

4. Leeward Gate Width & Geometry

Recommendation: The separation distance between gate marks should be between 7 and 10 boat lengths. If set too narrow (< 6 boat lengths), overlapping boats will conflict under RRS Rule 18 mark-room zones. If set too wide (> 10 boat lengths), it ceases to function tactically as a gate.
PRO Guide Reference: World Sailing Race Management Manual - Section H5 (Leeward Gates) / US Sailing PRO Guide - Ch. 12 (Course Setting and Adjustments).

📋 SLSC Proper Operation Sequence Guide

Step 1: Define Location, Fleet, Course & Wind (Course Setup Screen)
  1. Select Committee Boat Location under STEP 1. If using "Use Live Device GPS", coordinates will stream automatically; click ⚓ Click to Lock GPS Anchor Position to freeze your anchored position and start the drift monitor. If using "Enter Coordinates Manually", type your coordinates directly. [Sim Mode] Select a preset location (Mid Lake, North, or South) to run the simulator.
  2. Select the Longest Boat in Fleet Race under STEP 2 (critical for line and course lengths).
  3. Select the Course Configuration under STEP 3.
  4. Enter the True Wind Direction under STEP 4 and True Wind Speed under STEP 5.
Step 2: Configure Line Length, Skew & Marks (Right Column)
  1. Set starting line length and skew angle/method to establish the starting gate.
  2. Set the windward mark offset distance and skew angle/method.
  3. For courses with gates (L1/L2-Gate): Set the leeward gate separation distance and skew angle/method.
  4. For courses with triangles (T1, T2, M1, M2, G, F, O): Select the gybe mark angle.
    ⚠️ Important Note: You must consider **peak wind gusts**, not just average wind speed, when choosing the gybe angle to prevent dangerous jibing loads and ensure stable, high-speed planing.
    Wind/Gust Speed Recommended Gybe Angle
    Light (<8 MPH) 90° (Wide Angle for reaches)
    Moderate (8-14 MPH) 105° (Intermediate Angle)
    Heavy/Gusty (15+ MPH) 120° (Shallow Angle for planing)
Step 3: Handoff & Export to Mark Set Boats (Course Setup Screen)
  1. Enter cellphone numbers and send the course configuration link under STEP 6.
  2. [Sim Mode] Alternatively, click Preview in Navigator to open the navigator app, or click Copy Navigator Link to test the layout in the simulator.
Step 4: Navigate to Buoys (Navigator Screen)
  1. Sync or load the course coordinates. (This is done automatically if opened from the Setup Link, or you can paste the coordinates text block).
  2. Select the active buoy to navigate to from the Active Navigation Target menu. (Note: A target mark must be selected before navigating. [Sim Mode] A target mark must be selected before starting the simulator).
  3. Select the navigation mode: **Direct** or **Downwind Approach** (recommended for approaching all Marks from downwind to be easier to hold position when setting the mark).
  4. Start GPS tracking to receive steering angles and distance to the mark. [Sim Mode] Or, click Start Simulator to test-run the boat on the map. Boat speed can be manually entered but if too fast it will not function correctly.

② Course Geometries & Calculators

📏 Starting Line Calculation Settings
🚩 Windward Offset Mark Settings