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The Pilots Desk
Seaplane baseScheduled service

Chatham Seaplane Base

IATA CYMICAO CYMLocal 05AA🇺🇸 Chatham
Coordinates
57.5149°N, 134.9460°W
Type
Seaplane base
Country
🇺🇸 United States
Region
US-AK
Time zone
Sitka(UTC-08:00)
Magnetic variation
17.4° E

Daylight today(Jul 15, 2026, local time)

Civil dawn
03:23
Sunrise
04:25
Sunset
21:48
Civil dusk
22:50

About 17h 23m of daylight. Civil twilight (dawn/dusk) approximates the FAA definition of night for logging and currency. Times are computed and approximate — verify with official sources.

About Chatham Seaplane Base

Chatham Seaplane Base is a privately owned, public use seaplane base located in Chatham in the U.S. state of Alaska. Chatham lies within the limits of the City and Borough of Sitka, Alaska.

Summary from Wikipedia licensed under CC BY-SA.

Map

Runway centrelines, navaids and overlapping airspace. Tiles © OpenStreetMap contributors. Reference only — not for navigation.

Runways (1)

RunwayLengthWidthSurfaceLightingStatus
NW / SE10,000 ft / 3,048 m1000 ftWaterUnlitOpen

Nearby airports

Cube Cove AirportUS-4953
26 nm NNE (17°)
Sitka Rocky Gutierrez AirportSIT
31.2 nm SSW (206°)
Hoonah AirportHNH
37.9 nm NNW (337°)
Kake AirportPAFE
47.3 nm SE (134°)
Juneau International AirportJNU
51.8 nm NNE (13°)
Snettisham Airport7AK2
53.8 nm NE (46°)

Great-circle distance and true bearing from Chatham Seaplane Base.

Wikipedia Live tracking (FR24) Open in Maps
🇺🇸 More airports in United States📘 Flying in the United States: a pilot's guide

Frequently asked questions

What is the airport code for Chatham Seaplane Base?

Chatham Seaplane Base uses the IATA code CYM.

Where is Chatham Seaplane Base located?

Chatham Seaplane Base is seaplane base located in Chatham, United States.

How many runways does Chatham Seaplane Base have?

Chatham Seaplane Base has 1 runway, the longest being 10,000 ft / 3,048 m.

What time zone is Chatham Seaplane Base in?

Chatham Seaplane Base is in the America/Sitka time zone (UTC-08:00).

What is the magnetic variation at Chatham Seaplane Base?

The magnetic variation (declination) at Chatham Seaplane Base is approximately 17.4° E, per the World Magnetic Model. Variation changes slowly over time — always use the current value charted for navigation.

What airports are near Chatham Seaplane Base?

The nearest airport to Chatham Seaplane Base is Cube Cove Airport (US-4953), about 26 nm to the nne, followed by Sitka Rocky Gutierrez Airport and Hoonah Airport.

Is the information on this page suitable for flight planning?

No. Chatham Seaplane Base data here is for reference and training only — not for navigation. Always consult official sources and current charts before any flight.