Messing about in boats since 1975.  Online Since 1997.

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The 36' Trawler Yacht


36' Pocket Trawler - GREATHEART - Kasten Marine Design, Inc.
Outboard Profile | Interior Layout | Perspective Forward | Perspective Aft

Copyright 1999 - 2014 Michael Kasten

General Concept

As with her near sister the Vagabond 36, the intent of the Greatheart 36 design shown here has been to create an aluminum trawler yacht as simply as possible for economy, and as rugged and seaworthy as possible for long range ocean passages. See the images available via the links above for detailed views of the interior and exterior.

Power requirements are very modest, therefore engine choices are many. An engine of any make having 50 hp will be very adequate to drive the vessel, and predicted top speed with that power is around 7.5 knots.

One very fine engine is the Lister 4 cylinder Alpha, available in horsepower ratings from 40 hp to 55 hp. It would be ideal to couple the Lister engine to a Sabb HVP-25 controllable pitch propeller. In fact, this very combination is available directly from Sabb, maker of the CP gear.

Dimensions of the 36' Greatheart are:

Interior Arrangement

The accommodations below and in the pilot house are intended to provide comfortable cruising for two people on extended passages, with the occasional addition of one or two guests.

36' Pocket Trawler GREATHEART - Kasten Marine Design, Inc.

One of the forward settees extends out to become a temporary double. A generous owner's cabin aft provides ultimate privacy and a true "double bed" size berth. With the wheel house above the engine room amidships, all is in balance and there is plenty of room for machinery and tanks. One great feature of this boat is the aft facing seat on the sun deck aft!

The Greatheart 36 will be an extremely economical boat to build and to cruise. By design, the Greatheart series of vessels are strong, safe, stable and efficient, offering trans-ocean capability and cozy local cruising. Possibly the ideal trawler for a cruising a couple....

Additionally, with a beam of just over 10 feet, and a "dry" weight of under 15k lbs, the boat could easily be trailered from one cruising site to another.

In short, quite an amazing little ship....!

Sail Rig...

The sail rig shown in the above images is only intended to be sufficient for get-home purposes in the event of engine trouble and to also act as steadying sails. In other words, sailing performance was not considered a top priority, thus the design is primarily that of a motor vessel.

The hull would however sail well if given sufficient sail area and a revised keel profile. In the Color Profile I have sketched a proposed keel profile and a proposed forward mast location. The sail rig for that configuration is yet to be determined. The amount of sail area possible would depend on the stability characteristics after adding ballast in a revised keel profile.

36' Pocket Trawler GREATHEART - Kasten Marine Design, Inc.
Click for Larger Image
Perspective Forward | Perspective Aft

Design Genesis

As with our other designs in this series of designs that use a similar hull form, the Greatheart 36 has been adapted from real trawlers - US West Coast fishing vessels which have to operate in all weathers - including in the Gulf of Alaska, a place where the ocean is... well, not so nice. Our aim has been to retain the excellent sea keeping qualities of those working craft, and to refine their lines into 'yacht' form to achieve a more easily driven hull with relatively light displacement. The following links illustrate similar vessels in the Gulliver / Greatheart / Braveheart series...

Greatheart 36 | Vagabond 36 | Gulliver 46 | Greatheart 48 | Greatheart 54
Greatheart 60 | Swallow's Nest 60 | Swallowtail 60 | Braveheart 53 | Braveheart 63 | Swallows Nest 70

In order to achieve a proportionately longer waterline and more interior space without increasing boat length, we developed another series of designs based on the same hull form, but with a more upright stem and transom. Combined, this reduces the overhangs and increases the WL length for a higher inherent speed, and to gain more interior space without increasing overall hull length. Check out the following links for boats in the Vagabond series...

Vagrant 49 | Vagrant 70 | Vagabond 50 | Voyager 52 | Valdemar 53 | Valdemar 70

For more information on this or other designs, please inquire

Direct Quote from an aluminum boat owner...
As an owner since 5 years of an aluminum boat I could not agree more with your preference for this material. She is a great boat and requires very little in the way of maintenance. I do a lot more reef snorkeling than the paint, polish, varnish and wax guys!

--Peter Kminek