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B18Seaplane Base

ALTON BAY

ALTON BAY, New Hampshire

Public usePublic504 ft MSL

Seaplane Base Information

Facility Type

SEAPLANE BASE

Elevation

504 ft MSL

Ownership

Public

Use

Public use

Coordinates

43.4776, -71.2370

County

BELKNAP

Water Lanes

IDLengthWidthSurface
01W/19W2,600 ft100 ftWATER

Frequencies

TypeFrequencyName
CTAF122.8ALTON BAY
UNICOM122.8ALTON BAY

Floatplane intelligence for B18

Live weather, decoded NOTAMs, AI briefings. Included in every AeroCopilot plan from $7.99/month.

Source: FAA NASR (seaplane base facility, water lanes, frequencies). Updated 2026-05-12 15:38 UTC.

B18 — ALTON BAY | Seaplane Base | AeroCopilot