How To: Setup your GPS

This article is about the settings for the Navi GT-31, a GPS that is developed for speedsurfing. The older Navi GT-11 settings can be found here. The Garmin Geko/Foretrex setup devices are not available at speedsurfingblog.com

General Info:
The Navi devices has to be used with an aquapack, box-it or other waterproof case. Also for reading the GPS-file you a SD-Card + SD-Card reader for your computer. Not all SD-cards are compatible, the SanDisk 2.0GB works good.

These Firmware versions are legal for GPS-Speedsurfing: Navi GT-31 with firmware versions V1.2 (B1405a), V1.3 (B1123T) or version 1.4 (B0315T). Download here.

Alerts:
The GT-31 can let you know by beeping what speed you have done. For this you need a new firmware version!?! To use this feature go to menu ALERT, and put BUZZER ON.

OVER SPEED mean the GPS will beep every second when you go faster than this speed. ALITITUDE and TARGET are no needed. SPEED GENIE is the function the GPS will tell in morse code the speed you have done. Important is a good speed genie setting in menu Setup (see below). With speedgenie to slow the upwind speed will count, to fast and speedgenie will not be activated.

Settings:
The settings can effect the speedresults, also the GPS has a back-up which should be ON. Check if the settings are OK in these menu:

MEMORY CARD:
LOG SWITCH: ON-FIX
MIN SPEED: 5KMH or 3KN
NMEA ITEMS: SBN 1SEC
FILE SIZE: CARD SIZE

DATA LOGGER:
INTERVAL: 1SEC
MIN SPEED: 5KMH or 3KN

SETTINGS:
UNIT: METRE or NM (whatever you use)
POWER MODE: NORMAL
USERNAME:  your name
SPEED AVG TIME: 10sec or 25sec for fast 500m runs (60sec doesn't work properly)
SPEED GENIE: (just above your upwind speed) in my case 55 KMH
HOLD KEY: KEY LOCK
VERSION: check if your version is legal

Erik Loots

Erik is windsurfer for 10+ years. In his daily life he is professional in construction dewatering, advisor, troubleshooter. Erik likes adventures, explore and to challenge himself. During his life he is trying to get the best out of it and have respect for the earth, nature and future generations. The modern world is about sharing, in this blog Erik shares his experiences, selfreflection and lessons learned.

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