Mariner 47 (Brewer) Information, Review, Specs

The Mariner 47 entered production in 1980, built by Mariner Yacht Co. of East Rochester, New Hampshire. Approximately seven to eight of these impressive vessels were constructed under the Mariner brand before the company ceased operations. Following this, the molds for the design were acquired, and roughly six more boats were built and sold as the Islander 48C, indicating the enduring appeal and quality of Brewer's design.

Ted Brewer, the acclaimed designer, was known for creating sturdy and sea-kindly cruising yachts. While the Mariner 47 features a fin keel and skeg-hung rudder, Brewer's broader philosophy often focused on designs for comfortable coastal and blue water cruising. The related Islander 48C, sharing the same design, was specifically engineered for offshore sailing, underscoring its robust intent. Mariner Yacht Co., founded by Jack Cogswell, was driven by a desire for improved yacht construction, focusing on larger cruising yachts suitable for longer voyages and comfortable liveaboard experiences. This ambition translated into the substantial build of the Mariner 47.

During its limited production run, there were variations in the Mariner 47. While initially offered as a sloop, a cutter rig was also an option, providing greater flexibility in sail management for offshore conditions. Some examples were launched as "tall rig sloops," with mast heights reportedly around 70 feet off the deck, while a ketch version was noted with a 61-foot mast. Owners have also noted that many of the Mariner 47s featured custom and unique interior layouts, suggesting a degree of personalization during construction.

Sailing Performance and Handling

The Mariner 47's specifications translate into a sailboat well-suited for serious cruising. With a Sail Area to Displacement (SA/D) ratio of approximately 16.68, she possesses a moderate sail plan that provides respectable performance across a range of wind conditions. While not a dedicated light-air racer, this ratio suggests a boat that will move capably without being overly sensitive to changes in wind strength.

The Ballast to Displacement (B/D) ratio of nearly 39% points to a stiff and stable vessel, capable of standing up to a significant amount of wind and providing a comfortable motion in a seaway. This high ballast ratio contributes to the boat's offshore capabilities, instilling confidence in challenging conditions.

Further indicating its cruising pedigree, the Displacement to Length (D/L) ratio of 260.0 places the Mariner 47 firmly in the heavy-displacement category for its length. This means a powerful, comfortable motion, rather than a light, twitchy one, ideal for eating up miles offshore. Her long waterline of 37 feet, combined with a length overall of 47.5 feet, contributes to a theoretical hull speed of 8.15 knots, allowing for efficient passage making. The fin keel and skeg-hung rudder configuration offers a good balance of hydrodynamic efficiency for upwind performance and directional stability, with the skeg providing additional protection for the rudder blade. Owners have described the Mariner 47 as a "very fast and beautiful tall rig sloop," reinforcing its commendable sailing characteristics. The design is well-regarded for its directional stability, particularly when considering its relation to the Islander 48C, which was noted for its long keel providing better directional stability.

Accommodations and Layout

Given its substantial length overall of 47.5 feet and broad beam of 13.83 feet, the Mariner 47 was designed to offer generous accommodations for extended cruising and liveaboard comfort. While specific factory interior layouts for all Mariner 47s are not widely documented, it is understood that some vessels featured custom and unique arrangements, allowing owners to tailor the living spaces to their preferences.

Based on its size and cruising purpose, a typical interior arrangement would likely include multiple private cabins, such as a forward V-berth, a spacious main salon with settees convertible to berths, a well-appointed galley for meal preparation offshore, and at least one dedicated head compartment. The builder's focus on "more space and amenities" for "comfortable liveaboard experiences" suggests quality finishes and practical layouts designed for long-term comfort. Given its era of construction, interiors would commonly feature warm wood trim, ample storage, and robust construction materials, consistent with a capable offshore cruiser.

Owner's Perspectives

Owners of the Mariner 47, and its sibling the Islander 48C, generally express high regard for these Ted Brewer designs. The boats are often praised for their solid construction and robust feel, qualities essential for long-distance cruising. The sentiment of owning a "very fast and beautiful tall rig sloop" is echoed among some, highlighting the boat's enjoyable sailing performance. The continued presence and active community surrounding these vessels, with owners seeking information and sharing experiences on forums, further attest to their durability and practical design. The enduring appeal of the Mariner 47 underscores its legacy as a well-built and capable cruising yacht.