Automatic Identification System (AIS) is a marine safety technology that allows vessels to broadcast and receive real-time position, speed, course, and identification data from other AIS-equipped boats.
In simple terms:
It lets you see other vessels on your chartplotter — even in fog, darkness, or heavy traffic.
🔎 The Different Types of AIS
Class A AIS Transponders
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Required on large commercial vessels
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Higher transmission power & update rate
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Broadcasts full vessel data continuously
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Best for ships, ferries, and commercial traffic
Class B AIS Transponders
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Designed for recreational boats
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Lower power than Class A
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Still broadcasts your position to nearby vessels
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A major safety upgrade for offshore and coastal boaters
AIS Receivers (Receive-Only)
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Lets you see AIS vessels
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Does NOT broadcast your boat’s position
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Often built into chartplotters or standalone units
💡 Many modern VHF radios now include AIS receivers built right into the unit — a smart and space-efficient upgrade at the helm.
⚠️ Is AIS Fail-Safe?
No system on the water is completely fail-safe.
Not every vessel runs AIS, and smaller boats, kayaks, and unregistered traffic may not appear on screen.
However, AIS dramatically increases situational awareness — especially in:
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Fog
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Night running
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Busy inlets (like Fire Island & Great South Bay)
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Offshore runs
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Commercial traffic zones
🛟 The Real Benefit: Increased Situational Awareness = Increased Safety
AIS should never replace radar, proper lookout, or safe navigation practices.
But when used correctly, it creates a net safety gain by helping captains:
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Identify approaching vessels early
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Avoid collision risks
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Monitor traffic patterns
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Navigate crowded waterways more confidently
At Oakdale Yacht, we strongly recommend AIS for serious boaters running Long Island waters, especially offshore or in low-visibility conditions.
📞 Questions about AIS installation, upgrades, or compatible VHF/AIS systems?
Call our team: (631) 589-1087
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