Larson's Seaplane Base (MA74) — Tyngsboro, MA

Location & QuickFacts

FAA Information Effective	2026-09-03
Airport Identifier	MA74
Airport Status	Operational
Longitude/Latitude	71°25'5.2300" W / 42°41'29.3230" N -71.418119 / 42.691479 (Estimated)
Elevation	90.00 ft / 27.43 m (Estimated)
From nearest city	1 nautical miles NE of Tyngsboro, MA
Location	Middlesex County, MA
Magnetic Variation	16W (1985)

Owner & Manager

Ownership	Privately owned
Owner	KAREN M. TAFT
Address	12 LARSON AVE TYNGSBORO, MA 01879
Phone number	978-649-7172
Manager	KAREN M. TAFT
Address	12 LARSON AVE TYNGSBORO, MA 01879
Phone number	978-649-7172

Airport Operations and Facilities

Airport Use	Private
Wind indicator	No
Segmented Circle	No
Control Tower	NON-ATCT
Landing fee charge	No
Sectional chart	NEW YORK
Region	ANE - New England
Responsible ARTCC	ZBW - BOSTON
Tie-in FSS	BDR - BRIDGEPORT
FSS on Airport	No
FSS Toll Free	1-800-WX-BRIEF

Runway Information

Runway 13W/31W

Dimensions	2500 x 400 ft (762 x 122 m)
Surface	WATER
Surface treatment

	13W	31W
Traffic pattern	Left	Left

Radio Navigation Aids

ID	Type	Name	Ch	Freq	Var	Dist
MHT	DME	MANCHESTER	91X	114.40		10.9 nm
LWM	DME	LAWRENCE	72X	112.50		14.6 nm
PSM	DME	PEASE	112X	116.50		35.0 nm
EEN	DME	KEENE	90Y	114.35		39.1 nm
CO	NDB	EPSOM		216.00	16W	25.7 nm
ESG	NDB	ROLLINS		260.00	16W	41.0 nm
BOS	VOR/DME	BOSTON	74X	112.70	16W	27.6 nm
GDM	VOR/DME	GARDNER	116Y	116.95	14W	29.6 nm
CON	VOR/DME	CONCORD	76X	112.90	15W	32.5 nm
PUT	VOR/DME	PUTNAM	121X	117.40	14W	48.1 nm
BED	VOT	BEDFORD		110.00		14.7 nm
BOS	VOT	BOSTON		111.00		27.6 nm
ORH	VOT	WORCESTER		108.20		32.4 nm

Remarks

• FOR CD CTC BOSTON APCH AT 603-594-5551.
• VFR WX CONDS ONLY.