R/V Peter M Mahoney

Three men standing on a wooden dock posing in front of the blue hull of the R/V Peter M Mahoney.
The Peter M. Mahoney is a 150-foot Offshore Supply Vessel owned by Goodwin Marine Services and built by Master Boat Builders in 1998. It has a gross tonnage of 95 (439 GT ITC) and a speed of 9-12 knots. The vessel features a clear deck of 90’ x 30’ with a cargo capacity of 400 LT, multiple deck equipment including a knuckle boom crane, with a 3086 lb capacity at a fully extended length of 75”, 20-ton 14’ hydraulic A-frame, and a 25,000 lb. winch. It is powered by two CAT 3508 MUI engines (1610 HP at 1300 RPM) and two CAT 3304T generators.
The Peter M. Mahoney is equipped with modern navigation and safety systems, including Furuno radar, GPS, autopilot, AIS, and HYPACK survey software. It has accommodations for 20 people, a full galley, lounge with TV, walk-in cooler, and climate control. Safety features include liferafts, EPIRB, survival suits, MOB recovery platform, and fire stations.
The vessel’s tank capacities include 45,354 gallons of fuel, 80,122 gallons of ballast water, 52,598 gallons of liquid mud, and 9,824 gallons of potable water, making it well-suited for offshore supply and support operations.
View Spec Sheet
Profile view of the R/V Peter M Mahoney vessel floating at sea, showcasing its deck space and crane equipment.
The Goodwin Marine Services R/V Peter M Mahoney offshore support vessel navigating open ocean waters.
Interior view of the crew dining and briefing area inside the R/V Peter M Mahoney, featuring booth seating, tables, and safety bulletin boards.
Interior view of the fully equipped crew galley inside the R/V Peter M Mahoney, featuring wooden cabinetry, expansive countertops, and standard appliances.
Interior view of a crew berthing cabin on the R/V Peter M Mahoney featuring two sets of wooden bunk beds with built-in storage drawers.
Interior view of a crew berthing cabin on the R/V Peter M Mahoney featuring wooden bunk beds, a storage wardrobe, and designated life jacket storage.
Technical blueprints and general arrangement plans for the Goodwin Marine Services vessel Peter M Mahoney, including outboard profile and deck layouts, alongside detailed engineering schematics for a 10-ton A-frame.
General Arrangements
General

Type: Offshore Supply Vessel

Owner: Goodwin Marine Services

Builder: Master Boat Builders

Year Built: 1998

Gross Tonnage: 95 (439 GT ITC)

Net Tonnage: 65

Official Number: 1062381

USCG Inspection: Subchapter L

ABS Load Line: Yes

Speed: 9-12 kts

Deck Equipment

Crane: PALFINGER knuckle boom

Capacity: 3,086 lb. at 65 ft

Hydraulic A-Frame: 17’ vertical clearance

Capacity: 10-ton

Winch: Pullmaster H30

Capacity: 25,000 lb.

Sonar Pole: 6” retractable w/ adapters

Pot Hauler: 17” side mount w/ davit

Mounted Deck Plates: Threaded flush mounted stainless steel deck plates to accommodate a multitude of equipment/ deck configs.

Accommodations

Certified to Carry: 20 persons

Berthing: (2) 2-person staterooms  (3) 4-person staterooms  (1) 6-person staterooms

Full Galley: Yes

Lounge w/ TV: Yes

Walk-in Cooler: Yes

Heat & A/C: Yes

Heads w/ Showers: 2

Machinery

Main Engines: (2) CAT 3508 MUI

Maximum HP: 1610 at 1300 RPM

Generators: (2) CAT 3304T

Bow Thruster: CAT 3126

Hydraulic Engine: 471 Detroit

Deck Generator: 40 kW (110/220/480 volt)

Fuel Consumption:
– Main Engines 75 gph (transit) 25 gph (ops)
– Generator 4 gph
– Deck Generator 1.5 gph

Anchor Windlass: Yes

Fire Monitor: 4” Ekhart

Electronics

Fathometer: FURUNO FCV-1150

Loud Hailer: SH VLH-3000

GPS: FURUNO GP32 Hemisphere Vector V500

VHF: Yes
(2) Uniden UM380
(1) iCOM IC-M502

Autopilot: SIMRAD AP70MK2

Radar: Yes
FURUNO RDP 118
FURUNO RDP 150

Navtex: FURUNO NX-300

SSB: SEA 222

PC Plotter w/ Nav. : 2

Survey Software: HYPACK

AIS: SI-TEX SAS-900

Safety Equipment

Liferaft: (2) 25-person

Liferings: 8

EPIRB: ACR RLB-32 CAT 1

Flare Kit: 12 rocket parachute flares

SART: ACR Pathfinder PRO

Line Throwing Gun: CG85 Bridger

Lifejackets: (22) Adult SOLAS
(10) Spinlock DURO SOLAS

Personal Locator Beacon: 10

MOB Recovery Platform: Yes

Survival Suits: (20) SOLAS

First Aid Kit: 3

Fire Stations: 4

AED: HeartSine Samaritan

Capacities

Fuel Capacity: 45,354 (97,952 gal w/ mud tanks)

Ballast Water: 80,122 gal

Liquid Mud: 52,598 gal (1,252 bbls)

Potable Water: 9,824 gal