Get the MarineRadar appSatellite AISSatellite live trackingTrack any shipLive alerts112,000+ ships trackedDownload free

Port of City Island

USIS3🇺🇸USA

Port Location

About Port of City Island

City Island Harbor is a protected body of water in the Bronx, New York City, opening to Long Island Sound. It serves as a harbor for recreational vessels and is equipped with pilot and tug services.

Background
City Island Harbor is the protected body of water between City Island and Hart Island in the Bronx, New York City, open to Long Island Sound at its northern and southern extremities. It is not a true harbor, but a sound. Other minor islands in and around City Island Harbor include the Chimney Sweeps Islands, the Blauzes, and Rat Island. Green Flats Reef is exposed at low tide.

Current Conditions

Loading current conditions…

Vessel Limits

Channel Depth
11ft
Tidal Range
2ft
Elevation
-1m

Operations & Services

Port of Entry
No
Pilotage Compulsory
Yes
Tug Assistance
Yes
Drydock
U
Repair Code
B

References & Identifiers

WPI No.
7625 →
GeoNames ID
5112737 →
Wikidata
Q5123251 →
Wikipedia
Read on Wikipedia →

Identification

UN/LOCODE
USIS3
Country
🇺🇸USA
Time Zone
UTC-5
Feature Type
HBR (Harbor)

Classification

Type
Port
Harbor Type
Coastal natural
Shelter
Good

Region

Subdivision
US-NY
Latitude
40.8333°
Longitude
-73.7833°

Nearby Vessels

Flag
Type
Name
Dist.
Live tracking · 50,000+ mariners

Track ships at the Port of City Island in real time

Live AIS positions, arrivals, and departures at USIS3 — straight from your phone.

Live AIS positionsArrival alertsVoyage history
Get the App

Frequently Asked Questions

How do I navigate the approach to the Port of City Island?+
The approach to City Island is supported by 5 navigation aids within 50 nautical miles. The nearest is Stepping Stones Lighthouse at 0.7 NM to the SE. Other aids include King'S Point (1.5 NM SE), Throg'S Neck (1.7 NM S), Sands Point (3.1 NM NE), Execution Rocks (3.4 NM NE). Mariners should consult the relevant chart and List of Lights for full approach details.
What major shipping routes pass near the Port of City Island?+
The Port of City Island is located within the US East Coast shipping lane — a major shipping corridor serving ports along the Atlantic seaboard of the United States. This strategic position influences vessel traffic density, anchorage availability, and port scheduling.
How do I track vessels arriving at or departing from the Port of City Island?+
You can track vessels near City Island (USIS3) in real time using MarineRadar. The platform displays live AIS positions of nearby ships, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page or search for USIS3 on the live map.
What are the operating hours and time zone for the Port of City Island?+
The Port of City Island operates in the UTC-5 time zone. Operating hours, VTS schedules, and pilot availability vary — vessel agents should confirm with the port authority in advance, especially for night arrivals or weekend operations.