Massachusetts Boating Law: Certificates, Age Limits, and Equipment

To operate a boat legally in Massachusetts, you need a registered vessel, the required safety equipment on board, and, under the new Hanson Milone Boater Safety Act, a boater safety certificate on deadlines that depend on your birth year. Massachusetts boating laws sit in Chapter 90B of the General Laws and are enforced on the water by the Massachusetts Environmental Police.¹ The rules cover who can drive, how fast, how far from swimmers, how sober, and what you must do when something goes wrong.

Boater Safety Certificate Requirement

The Hanson Milone Boater Safety Act, signed in 2024, phases in a universal education requirement for anyone operating a motorboat or personal watercraft on Massachusetts waters. The deadlines are staggered by birth year.

If you were born after January 1, 1989, you must have a valid boater safety certificate to operate a motorboat after April 1, 2026. If you were born on or before January 1, 1989, you have until April 1, 2028. The Environmental Police will not issue penalties tied to the certificate requirement until September 1, 2026, which gives operators born after 1989 a short grace period.²

You must carry proof of completion while on the water and have it available for inspection. A person over 12 without a certificate can still operate a motorboat, but only under the direct supervision of someone 18 or older who holds one. Boat owners can face liability for knowingly letting an uncertified operator take the helm.²

Operating without a required certificate is a $50 fine for a first offense and $100 for each subsequent offense.³

Age Limits for Operators

Children under 12 cannot operate a motorboat at all unless accompanied and directly supervised by a competent adult at least 18 years old. Operators aged 12 to 15 must complete an approved basic boating course to operate a motorboat without adult supervision, and must carry the resulting state-issued certificate on the water.¹

No one under 18 may supervise another person’s operation of a motorboat, regardless of their own certification.² The minimum age to operate a personal watercraft is 16, with no exceptions. A 15-year-old with a boater safety certificate still cannot legally drive a jet ski.¹

Registration and Fees

Any motor-powered vessel on Massachusetts public waterways needs a Certificate of Number from the Massachusetts Environmental Police.⁴ There are a few exceptions: vessels without any motor, boats properly registered in another state and used in Massachusetts for 60 or fewer consecutive days, and vessels documented with the U.S. Coast Guard.⁵

The registration number must be painted or applied as a decal on the forward half of each side of the vessel in at least three-inch bold block letters, clearly visible from a distance. The validation decal goes on the port side within six inches of the registration number.⁵ Registration lasts two years. Renewal fees by vessel length:

Under 16 feet: $44
16 to under 26 feet: $66
26 to under 40 feet: $88
40 feet and over: $110

These are biennial fees covering the full two-year period.⁶ A new boat purchase also triggers 6.25% Massachusetts sales tax, due by the 20th of the month following purchase. Late payments accrue interest and penalties.⁷

Required Safety Equipment

Every vessel must carry at least one U.S. Coast Guard-approved wearable personal flotation device in the right size for each person on board.⁸ Children under 12 must actually wear the life jacket at all times while on deck or in open areas. One stored in a compartment does not satisfy the rule for a young passenger.

Visual distress signals are required on coastal waters, the Great Lakes, territorial seas, and connected waters up to two miles wide. During the day, boats under 16 feet are exempt, but at night every vessel needs signals. Boats 16 feet or longer must carry signals usable in both daylight and darkness, such as three combination day/night red flares.⁹

Motorboats need accessible, functional fire extinguishers. Navigation lights are required at night and in reduced visibility: red and green sidelights plus a white stern light. Vessels 39.4 feet (12 meters) or longer must also carry both a whistle and a bell for sound signaling.¹⁰

The Hanson Milone Act added one more item. If your motorboat or personal watercraft came from the manufacturer with a lanyard-type engine cutoff switch, you must attach that lanyard to yourself, your clothing, or your wearable life jacket while operating the vessel.¹¹

Speed and Distance Rules

Massachusetts defines “headway speed” as the minimum speed at which a vessel can still steer, capped at six miles per hour.¹² You must stay at or below headway speed:

Within 150 feet of a swimmer
Within 150 feet of a marina, boat ramp, raft, or float
Within 300 feet of any shoreline being used as a swimming area, public or private
When visibility is blocked by a bridge, bend, or any other obstruction
In a marked channel, unless signs or markers permit a higher speed¹³

Note the swimming-area distance is 300 feet from shore, not the 150-foot distance that applies to an individual swimmer in the water.

Extra Rules for Personal Watercraft

Personal watercraft like jet skis carry restrictions beyond standard motorboat rules. PWC may only be operated between sunrise and sunset, with no exception for well-lit areas or holiday evenings.¹ PWC operators must also hold a boater safety certificate on the same Hanson Milone Act deadlines that apply to motorboat operators.

PWC face a stricter version of the headway-speed rules too. In addition to the standard distances that apply to all motorboats, a PWC must maintain headway speed within 150 feet of any moored vessel. That restriction does not apply to motorboats generally, but it applies to every jet ski on the water.

Boating Under the Influence

Operating any vessel on Massachusetts waters with a blood alcohol concentration of 0.08% or higher is illegal, as is operating under the influence of marijuana, narcotics, or other intoxicating substances.¹⁴ The Environmental Police run patrols and sobriety checkpoints to enforce it.

Penalties climb sharply with repeat offenses:

First offense: a fine of $100 to $1,000, up to two and a half years in jail, or both.
Second offense within six years: a fine of $300 to $1,000 and 14 days to two and a half years in jail. The court cannot reduce, suspend, or waive the first 14 days.
Third offense within six years: a fine of $500 to $1,000 and six months to two and a half years in jail, with six months as an absolute mandatory minimum.¹⁴

Those mandatory minimums for second and third offenses are real floors. A judge cannot grant probation, parole, or good-conduct credit to release someone before serving 14 days or six months respectively.

Accident Reporting

If a boating accident results in death, personal injury, or property damage exceeding $500, the operator must immediately notify the Division of Law Enforcement. A written report is required within 48 hours if someone died, and within five days for all other reportable accidents.¹⁵

The $500 threshold catches more incidents than people expect. A cracked hull, bent propeller, or damaged dock can easily cross it. Failing to file is itself a violation.

Invasive Species Before Launch

Preventing the spread of invasive aquatic species is a separate obligation worth knowing before you launch at a new ramp. Under Chapter 21, Section 37B of the General Laws, no one may place a vessel, trailer, or associated equipment into inland waters if it has any aquatic nuisance species growing on or attached to it. Before launching at a new location you must clean, decontaminate, or treat the vessel to remove all plant material and organisms. Knowingly violating the rule can draw a penalty of up to $5,000 per violation, and each day of continued violation counts as a separate offense.¹⁶

Massachusetts does not require boat owners to carry insurance. That silence in the law is not an endorsement of going without it: a serious collision can produce medical and repair costs well beyond the value of the boat, and lenders financing a boat will usually require coverage regardless of what state law says.

1
Mass.gov. Massachusetts Boating Law Summary
2
Mass.gov. Hanson-Milone Boater Safety Act Frequently Asked Questions
3
Mass.gov. Massachusetts General Laws Chapter 90B Section 9F
4
Mass.gov. Boat Registration
5
Town of Lakeville, Massachusetts. The Legal Requirements of Boating
6
Mass.gov. Boat and Personal Watercraft Registration Renewal
7
Mass.gov. First-Time Boat Registration
8
General Court of Massachusetts. Massachusetts General Laws Chapter 90B – Section 5A
9
U.S. Coast Guard. USCG Visual Distress Signal Requirements FAQs
10
BoatUS Foundation. Required Equipment
11
General Court of Massachusetts. Acts of 2024 Chapter 350 – An Act Relative to Boater Safety to be Known as the Hanson Milone Act
12
Commonwealth of Massachusetts. Massachusetts Code 323 CMR 2.00 – The Use of Vessels
13
Legal Information Institute. 323 CMR 2.07 – Operation
14
General Court of Massachusetts. Massachusetts General Laws Chapter 90B – Section 8
15
General Court of Massachusetts. Massachusetts General Laws Chapter 90B – Section 9
16
General Court of Massachusetts. Massachusetts General Laws Chapter 21 – Section 37B