Set Up 1Hz Recording for Better Data

Configure your Garmin watch to record GPS data every second for maximum track quality and accurate sailing analysis.

By default, most Garmin watches use "smart" recording which only saves a GPS point when the watch detects a change in direction or speed. This saves battery but creates gaps in your data.

For sailing analysis, you want a GPS point every second (1Hz recording). This gives you smoother tracks, more accurate speed readings, and better maneuver detection.

How to change the recording frequency

On your Garmin watch:

1. Hold UP and press START to open the main menu
2. Navigate to Settings
3. Select System
4. Select Data Recording
5. Change Recording Interval to Every Second

This setting applies to all activities on your watch.

Why does it matter?

With "smart" recording, the watch might only save a point every 3-5 seconds (or longer on straight lines). When sailing, that means:

• Tacks and jibes look like sharp angles instead of smooth curves
• Speed data has gaps so peak speeds may be missed entirely
• Start line analysis is less precise because you have fewer data points
• VMG and polar calculations are noisier

With 1Hz recording, ChartedSails can:

• Accurately detect and measure every maneuver
• Calculate precise polar performance data
• Show smooth track replays
• Identify your exact timing at the start line

What about battery life?

Recording every second uses slightly more battery, but on modern Garmin watches the difference is minimal for a typical sailing session. Most watches easily last a full day of racing with 1Hz recording.

Verify your setting

After changing the setting, record a short test activity and check:

1. Export the activity as a FIT file
2. Upload to ChartedSails
3. Look at the track detail - points should be evenly spaced, roughly 1 second apart