2019 Armstrong 38 Monohull Aluminum Boat in Seattle, WA 98101 US
Built in 2019
38 Monohull Aluminum
2 Engines (2x Cummins)
38 feet
Diesel
Aluminum
Sentry is a purpose-built 2019 Armstrong Marine 38 Monohull combining welded-aluminum commercial construction, a large working deck and an enclosed all-weather pilothouse. Although designated as a 38-foot model, her transom working-platform configuration brings overall length to approximately 43 feet, with a substantial 13-foot beam.
Twin Cummins QSB6.7 diesels rated at 419 hp each are coupled to ZF 286A straight-drive transmissions. During the May 2025 survey sea trial, Sentry recorded approximately 21.5 knots at 2,400 rpm and 28 knots at 3,000 rpm in calm conditions.
Originally owned and operated by the Washington State Department of Natural Resources, Sentry was acquired by her present owner for overseas commercial projects.
Sentry offers a practical platform for commercial utility work, environmental or hydrographic survey, dive support, patrol, crew transport, research operations or conversion into a distinctive private expedition boat.
Price History
| Date | Event | Price |
|---|---|---|
| 8/13/26 | Initial price | $495,000 |
Overview from around the web 2019 Armstrong 38 Monohull Aluminum
Customers rave about the 2019 Armstrong 38 Monohull Aluminum for its impressive combination of durability and performance
Many appreciate the robust aluminum construction, which not only enhances its strength but also contributes to its lightweight design, ensuring stability and speed on the water. The spacious layout and thoughtful design of the interior receive high praise, with users enjoying the comfortable living space and well-equipped galley, perfect for extended outings. The layout is often described as functional and aesthetic, providing ample storage and an inviting atmosphere for socializing or relaxing. Many sailors highlight the boat's seaworthiness, noting how it handles rough waters with ease, giving them confidence during their journeys. The sailing performance is frequently commended, with customers noting quick response times and excellent maneuverability, making it ideal for both novice and experienced sailors. In addition, the modern amenities and cutting-edge technology integrated into the Armstrong 38 enhance the sailing experience, ensuring ease of navigation and safety. Overall, customers express satisfaction with their investment, appreciating not only the boat’s performance but also the quality craftsmanship that reflects in every detail.
The Biggest Pros and Cons
Pros
Durable Construction: The aluminum hull offers exceptional strength and longevity, making it resistant to corrosion and impacts compared to traditional fiberglass boats.
Stability: The monohull design provides excellent stability in a variety of sea conditions, ensuring a smooth and comfortable sailing experience.
Lightweight Design: The use of aluminum allows for a lighter vessel, improving handling, speed, and fuel efficiency.
Customizable Interior: The interior layout can be tailored to suit individual preferences, making it a versatile option for different sailing needs.
Low Maintenance: Unlike fiberglass, aluminum requires less ongoing maintenance, easing the ownership experience and reducing long-term costs.
Environmental Considerations: Aluminum is a recyclable material, making it an eco-friendlier choice compared to other boat construction materials.
Performance: The Armstrong 38 is designed for excellent sailing performance, with effective sail plans and a hull shape that promotes speed and agility.
Cons
Heat Conductivity: Aluminum can conduct heat, which may lead to a hotter interior in warm climates unless properly insulated.
Initial Cost: The upfront cost of aluminum boats can be higher than that of fiberglass alternatives, which might deter some potential buyers.
Potential for Dents: While durable, the aluminum hull can be susceptible to dents or scratches if not handled carefully, especially during docking or anchoring.
Limited Sound Insulation: Aluminum can transmit sound more than fiberglass, which may lead to a noisier ride, especially when sailing in rough conditions.
Weight Distribution: Careful attention must be paid to weight distribution on board, as aluminum boats can be more sensitive to load imbalances.
Aesthetic Appeal: Some buyers may prefer the classic appearance of fiberglass boats over the industrial look of aluminum construction.
Made For
The 2019 Armstrong 38 Monohull Aluminum is designed for the adventurous sailor seeking a robust and resilient vessel that delivers exceptional performance on the water. Ideal for both seasoned sailors and those venturing into the world of sailing, this boat caters to a wide range of enthusiasts. Adventure seekers will appreciate its sturdy aluminum construction, providing added durability and safety in diverse marine environments. The spacious deck and smart layout make it perfect for leisurely coastal cruising or thrilling offshore explorations. For families and groups of friends, the Armstrong 38 offers comfortable accommodations and a well-thought-out interior that's perfect for extended voyages or weekend getaways. With ample storage and living space, it’s well-suited for those who value both functionality and comfort on board. Whether you're an avid sailor looking for a reliable performance yacht or someone who dreams of taking to the seas for the first time, the 2019 Armstrong 38 Monohull Aluminum is equipped to meet your needs. Its blend of strength, versatility, and modern design is sure to appeal to those ready to embark on their next nautical adventure.
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| Â |  2019 Armstrong 38 Monohull Aluminum | |||||
|---|---|---|---|---|---|---|
| Price | $495,000 | $423,812 | $385,000 | $380,000 | $114,999 | $99,657 |
| Location | Seattle | Seattle | Freeland | Freeland | La Conner | Mount Vernon |
| Nominal Length | 38' | 26' | 35' | 35' | 26' | 25' |
| Engine Make | Cummins | Mercury | Cummins | Cummins | Honda | Yamaha |
| Total Engine Power | 419 hp | 200 hp | 380 hp | 380 hp | 250 hp | 250 hp |
| Days on Market | 1 | 316 | 1 | 1 | 30 | 266 |
| Get in touch |
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Address
Boat Location
Contact WS Yacht Brokers about 2019 Armstrong 38 Monohull Aluminum
909 N Tomahawk Island Dr #104, Portland, OR, 97217
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