Airports / 72NH

72NH — Barndoor Island Seaplane Base

Alton, US-NH · US · 504 ft MSL

Runways

1 runway · longest 4,086'

11W / 29W

4,086' × 500'

Surface: Water

Select an aircraft to see density altitude estimates

Look up by Tail Number (N-Number) — auto-fills make & model

or select make & model manually

Manufacturer

Model

Outside Air Temp (°C) — blank = ISA standard

What you'll get:

· Density altitude calculation

· Power retained at this elevation/temperature

· Estimated takeoff roll increase

· Climb rate estimate

· Full scenario table (ISA-10 through ISA+40)

Elevation504' MSL

Longest Runway4,086'

SurfaceWAT

Coordinates 43.554, -71.232

Connect with experienced ferry pilots for domestic and international deliveries.