Can you use this radio to signal your gps coordinates to the uscg in a mayday situation?

Ken, that's a great question. I have, fortunately, had no reason to test this out. It does have a distress signal function, which I assumed included gps coordinates, but honestly do not know for sure. Time for more research! Thanks for getting me to think about this more....

Can you purchase a longer antenna

The hight the antennae is mounted is more important than the length of it. VHF is line of sight. The higher the tip of the antennae, the farther the signal can "see."

what does the "NB" in model number refer too?

The NB is for navy blue. There is also a black model.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Standard Horizon HX890NB Floating 6 Watt Class H DSC Handheld VHF/GPS - Navy Blue

Product ID: 351099201

Details

Brand
STANDARD
Color
Blue Navy
Compatible Devices
RM (likely a
International Protection Rating
IPX8
Number of Batteries
1 Lithium Ion
Number of Channels
66

🌊IPX8 waterproof rating

📡66 channel GPS receiver

🔋11-hour battery life

AR$1076255

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌊 Stay Connected, Stay Afloat!

EMERGENCY READY - Water-activated strobe light and DSC features for instant emergency signaling.
ADVANCED NAVIGATION - Built-in 66 channel WAAS GPS receiver for precise waypoint and route navigation.
UNMATCHED DURABILITY - Submersible IPX8 construction ensures reliability in any aquatic adventure.
USER FRIENDLY DESIGN - Large full-dot matrix display with easy-to-navigate menu for seamless operation.
POWERFUL COMMUNICATION - Selectable 6W transmit power for clear communication up to 5 miles.

The STANDARD HORIZON HX890NB is a robust handheld VHF/GPS device designed for marine enthusiasts. With a powerful 6W output, IPX8 waterproof rating, and integrated GPS, it ensures reliable communication and navigation. The device features a user-friendly interface, emergency signaling capabilities, and an impressive 11-hour battery life, making it an essential tool for any water adventure.

Specifications

ASIN	B08X12XK96
Additional Features	Submersible
Best Sellers Rank	#227,151 in Electronics ( See Top 100 in Electronics ) #118 in Marine Two-Way Radios
Brand	STANDARD HORIZON
Color	Blue,Navy,White
Compatible Devices	RM (likely a marine-related device or accessory)
Connectivity Protocol	USB
Customer Reviews	4.5 4.5 out of 5 stars (61)
Item Dimensions D x W x H	1.5"D x 2.6"W x 5.43"H
Manufacturer	Standard Horizon
Mfr Part Number	HX890NB
Model Number	HX890
Number of Batteries	1 Lithium Ion batteries required.
Number of Channels	66
Number of Packs	1
Talking Range Maximum	5 mile
Tuner Type	VHF
UPC	788026174256
Unit Count	1 Count
Water Resistance Level	Waterproof
Waterproof Rating	IPX8

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