Sentinel crew member inspecting below deck of a marine winch

Sentinel Maritime Safeguard & Inspection

Our clients have come to expect the high quality and reliability of our custom winches and deck machinery. Now, Markey Machinery offers the best in marine surveys and deck machinery repairs as well through the Sentinel Maritime Safeguard & Inspection program.

Sentinel works with your crew to quickly identify risk and bolsters your predictive maintenance program. The quantitative survey report provides the comprehensive information necessary to make informed decisions. These reports facilitate budgeting and planning for periodic dry dockings and overhauls. Your deck machinery is integral to your business or mission and you shouldn’t waste valuable time in port when your vessel could be working. This is why it’s important your winch system or deck machinery is surveyed regularly.

Thanks again for answering the call. You and your team have never let us down in the support department.

Years in the business
Custom Machinery Projects
Engineering Hours

Sentinel Program Services

Sentinel offers a wide array of services to boost your predictive maintenance program and repair your heavy deck & winch equipment quickly and efficiently.

On-Site Surveys & Inspections

Identify issues or ensure your deck & winch equipment complies with maritime regulations.

Remote Access Troubleshooting

Save time and money by letting us troubleshoot your equipment from any location.

Part Repair

Repair worn out parts with the expert engineers at Markey Machinery.

General Engineering

Design custom state of the art equipment.

Winch Familiarization Training

Train your crew on the basics of your heavy & winch deck equipment.

Control Engineering

Design electrical controls that work for the needs of your deck equipment.

Replacement Part Fabrication

Use the Markey Machinery crew to design & supply custom OEM parts.


Give new life to a worn out winch or other heavy deck machinery.


Give new life to a worn out winch or other heavy deck machinery.


Enhance the performance of your winch or deck machinery

Mechanical Engineering

Design custom parts and machinery with Markey’s expert engineers.

Key Features

Sentinel crew members conducting an inspection on a marine winch

Experienced Marine Winch Inspectors

Our marine surveyors are heavily involved in the engineering and builds of our winch & deck machinery. This makes them the ideal candidates to oversee the safety and maintenance of your winches and deck equipment. Our inspectors perform detailed surveys by combining thermal imaging technology, vibration analysis, and physical examinations of the equipment.

When the equipment passes inspection, Sentinel issues a report that states the equipment is safe and in compliance with maritime regulations. This quantitative report is valuable for Coast Guard inspections. In the case that the Sentinel surveyors diagnose an issue, a parts & service estimate will be included with the report. The report will be completed as soon as possible to get your winch repaired and back on the job.

Compliance With Maritime Regulations

OEM administered surveys and inspections enhance the safety, reliability, and ensure regulatory compliance of your winch system. With the Markey Sentinel Survey a customer can use it to ensure their essential towing systems are in compliance with Coast Guard Subchapter M regulations by The United States Coast Guard regarding safety, proper equipment maintenance, and record keeping. Our team will make sure your winch or deck machinery is up to par for the Coast Guard and safe for your crew to operate.

United States Coast Guard Laws & Regulation
Sentinel travels around the world to survey and service marine winches

On-Site & Remote Access Services

Field Service

No location is too remote for our marine surveyors and engineers. The Sentinel team will travel to your location to meticulously inspect and scrutinize your deck machinery to look for breaks or weaknesses. No need to come into port or dry dock for a winch inspection. For repairs, our team will work around the schedule of your vessel to bring your vessel into port or dry dock. This saves you time and money that your ship can be making out on the water.

Remote Access

Remote Access service allows our systems engineers to troubleshoot your control system from anywhere in the world. We can remote access your control system the same day you encounter a problem, saving you valuable time and money and preventing a costly trip back to port.

OEM Replacement Parts

Quick access to spare parts is critical to any successful operation. We stock critical wear items and can quickly produce service parts regardless of the age of your winch. Markey Machinery keeps detailed engineering records for virtually every winch or deck equipment item the company has ever built. Over the years, many electrical, hydraulic, and pneumatic product lines and components may become discontinued or obsolete. We actively identify reliable alternative components and suppliers to extend the life and functionality of your deck equipment.

OEM replacement winch parts in Markey Machinery Manufacturing Facility
Engineering consulting planning a deck machinery project

Engineering Consulting

The Sentinel program’s reputation is built upon decades of responsible, robust design practices by Markey Machinery. Leverage our engineering prowess to make your next winch or deck machinery build a success. Regardless of the age of your winch, Markey Machinery offers a broad range of consulting services, including vessel & equipment reconfigurations, winch modifications, adaptations, improvements, repowering, etc. Additionally, Markey Machinery can document and maintain equipment no longer supported by other OEMs. Markey can support your seasoned equipment: we frequently reevaluate drum charts, brake ratings, drum capacity, and other aspects of our winch systems.

Marine Winch Familiarization Training

The Sentinel Maritime Safeguard & Inspection team can provide on-site operational training for every marine winch we produce. Sentinel training reinforces your crew’s confidence in using your Markey deck machinery, further boosting the safety, efficiency, and reliability of your equipment. Sentinel training services help you manage the challenges of frequent crew changes experienced in the workboat and oceanographic domains. Our team can train your crew on winch controls, system familiarization, Markey Render/Recover® technology, basic maintenance and lubrication, warnings and lock-out procedures.

Sentinel Marine Winch Familiarization Training on Electric Control System
Markey building a custom OEM repair part in Seattle, WA

About Us

Markey Machinery has been building the best in marine winches and deck machinery for over 110 years. Our attention to detail and superior engineering has made us one of the most recognizable and trusted brands in the world. Some of our winches have been in service for decades and will be in use for years to come. Now our engineering expertise has led us to offer the best in marine surveying and deck machinery repairs so we can guarantee our products will keep serving your vessel for years to come.

Our Seattle Manufacturing Facility

We perform repair services at our fully outfitted factory in Seattle, Washington. Our winch manufacturing team can produce small and large replacement parts for every repair. We also provide spooling services, upgrades, and complete winch rebuilds and refurbishment.

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Sentinel Maritime Safeguard & Inspection

Contact Us

Contact the Sentinel Maritime team today for more information about the program or to schedule an inspection of your marine deck machinery. We will get back to you as soon as possible.

Call Us

Local: 206-576-3468

Toll Free: 1-800-637-3430