How does Jumpmaster Mode work on the Foretrex 801

Setting up Jumpmaster Mode

1. Select the Jumpmaster activity from the menu. The altimeter must be calibrated before the jump[4].

2. Choose the jump type (e.g. HALO - High Altitude Low Opening)[5].

3. Enter the jump information:
- Set the Desired Impact Point (DIP) as a waypoint for the landing location. You can preset this or add waypoints during the jump[5].
- Set the Drop Altitude Above Ground Level (AGL) when the jumper exits the aircraft[5].
- Set the Open Altitude AGL when the jumper opens their parachute[5].
- Set the Forward Throw, which is the horizontal distance traveled due to aircraft speed and jump angle[5].

During the Jump

The Foretrex 801 automatically detects when you have jumped and begins navigating toward the DIP using the barometric altimeter and electronic compass[4]. It provides navigation information to help the jumper reach the desired landing point.

Key Features

- Follows military guidelines for calculating the High Altitude Release Point (HARP)[4]
- Automatically starts navigation after detecting the jump[4]
- Provides navigation data to reach the preset DIP or added waypoints[5]
- Allows presetting jump parameters or modifying them during the jump[5]

The Jumpmaster mode is a powerful tool for experienced skydivers, but should not be used as a primary skydiving altimeter. Failure to input accurate jump information can lead to serious injury or death[4].

Citations:
[1] https://gearjunkie.com/technology/watches/garmin-foretrex-801-review
[2] https://platatac.com/garmin-foretrexr-801.html
[3] https://www.chutingstar.com/garmin-foretrex-801-wrist-mount-gps
[4] https://www8.garmin.com/manuals/webhelp/GUID-1B6BD381-3FB9-4F7D-BBB3-79BE9207F8FA/EN-US/GUID-97DD3FB0-DB77-4771-A1EE-C86E1901805B.html
[5] https://www.youtube.com/watch?v=Mygxo0n3t3A
[6] https://www.reddit.com/r/SkyDiving/comments/1co44i6/garmin_jump_master/
[7] https://www.asmc-unlimited.com/en/products/gps-gerat-fur-handgelenk-foretrex-801
[8] https://www.gpscentral.ca/product/garmin-foretrex-801/

What are the specific parameters you can set in Jumpmaster Mode

In Jumpmaster Mode on the Garmin Foretrex 801, users can set several specific parameters to optimize their skydiving experience. The key parameters include:

Jump Type

- HAHO (High Altitude High Opening)
- HALO (High Altitude Low Opening)
- Static Jump

The selected jump type determines the additional setup information required.

Specific Parameters

1. Desired Impact Point (DIP): This is a waypoint that indicates where the jumper aims to land. It can be preset or added during the jump.

2. Drop Altitude (AGL): The altitude at which the jumper exits the aircraft, measured in feet above ground level.

3. Open Altitude (AGL): For HALO jumps, this is the altitude at which the parachute is deployed, also measured in feet above ground level.

4. Forward Throw: This parameter accounts for the horizontal distance traveled due to aircraft speed and wind resistance, which helps in calculating where to aim for landing.

5. Wind Speed and Direction: Users can input wind speed information to adjust calculations based on altitude, typically specified per 1,000 feet.

6. Course to HARP: This sets the direction of travel due to aircraft speed, helping to calculate the High Altitude Release Point (HARP).

7. Constant Settings: These parameters allow for fine-tuning of jump plans based on specific conditions or preferences.

The Jumpmaster mode is designed primarily for experienced skydivers and follows military guidelines for calculating jump-related metrics[1][4][6].

Citations:
[1] https://www.youtube.com/watch?v=Mygxo0n3t3A
[2] https://www.cspa.ca/sites/default/files/2019%20JM%20Reference%20Manual%20%28en%29.pdf
[3] https://www.reddit.com/r/GarminFenix/comments/fnrb3i/jump_master_mode/
[4] https://www8.garmin.com/manuals/webhelp/GUID-1B6BD381-3FB9-4F7D-BBB3-79BE9207F8FA/EN-US/GUID-97DD3FB0-DB77-4771-A1EE-C86E1901805B.html
[5] https://irp.fas.org/doddir/army/fm3-05-211.pdf
[6] https://static.garmin.com/pumac/eTrexVista_Jumpmaster.pdf
[7] https://support.garmin.com/en-US/?faq=ikvuniC8Q62Kdt7mqQCkz8
[8] https://www.reddit.com/r/SkyDiving/comments/1co44i6/garmin_jump_master/

How do you calibrate the barometric altimeter in Jumpmaster Mode

To calibrate the barometric altimeter in Jumpmaster Mode on the Garmin Foretrex 801, follow these steps:

1. Access the Menu: Press the MENU button to enter the settings.

2. Select Sensors & Accessories: Navigate to find the option for Sensors & Accessories.

3. Choose Altimeter: Select the Altimeter option to access calibration settings.

4. Calibration Options:
- Auto Calibration: If you want to calibrate automatically based on your GPS starting point, select "Auto Cal." This option uses GPS data for elevation.
- Manual Calibration: If you know your current elevation (for example, from a weather station or local reference), select the option to enter it manually. Input the correct elevation in feet or meters as required.

5. Confirm Calibration: After entering the desired elevation, confirm your selection to complete the calibration process.

6. Check Settings: Ensure that any auto-calibration features are enabled if you want the device to adjust automatically in future uses.

It's essential to perform this calibration close to the time of your jump to ensure accuracy, as local barometric pressure changes can affect readings[1][2][3].