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Tenders and Crane
 


Tender Plan

The Ship's Launch

Since Anjumal will be our home, our tenders will be our cars.  Our plan is to cruise extensively.  We would like to anchor Anjumal in a safe place when visiting an area, then have a seaworthy tender that we can use to make comfortable day trips to the surrounding areas.  These long trips may include guests, scuba gear, and picnic supplies.  We wanted a large comfortable tender that had good speed, a seaworthy ride, range for a day.   We also wanted diesel power so we could fill it from our main tanks.
 

After a great deal of searching we narrowed the choices to Novurania and Nautica I/O tenders.  At this time we are planning on incorporating the Novurania Custom 6 meter.  The large, open fore space will accommodate a number of passengers for a short trip or a lot of gear for a longer trip.  The fore space will have an insert that can also turn it into a lounge to sun-bath while stopped in an out of the way place.  It has a walk through to the stern and a large boarding deck at the stern.  We'll have a hand rail and scuba tank storage on the platform, as well.  These purpose-built tenders come with lifting eyes for the crane and retractable cleats and lights for a low profile on deck.  The 50 gallon fuel take will give us plenty of range for a day.

Launch & Tender Crane

The down side of the large diesel tender is the 4000 pound dead weight that must be lifted to the boat deck.  This will be handled by a large Steelhead CT4000 19' extension boom hydraulic crane.  With this crane we can lift the tender and place it in the water on either side of the ship, or at the stern.  This flexibility will help us to deploy and retrieve in the widest range of conditions.

The navel architect has added strengthening to the aft saloon bulkhead to support the added weight and torque from the crane.  His calculations show the inherent stiffness of the hull will keep us to a maximum 5 degree list if the 4000 pound tender were held straight out to the side of the ship.  He also feels the additional weight on the boat deck will soften the ride a little bit from the initial hull and we should not require any compensating ballast.  We figure this is pretty good for a 65' ship carrying a 20' tender.

The Tender

If the Novurania is our car, then the dingy will be our pick-up.  This will be the boat we launch to take to the dingy docks, haul trash, land on the local beach, etc.  For this we have a 13' Caribe with 50 HP Honda stroke outboard.  This gasoline outboard powered inflatable is very comfortable for short trips, uses modest gasoline and is even powerful enough for some water skiing and water toys.  We've added a portable Garmin 276C GPS with depth finder so it can function in poor visibility and act as a depth scout.

The Dinghy

For back-up, the kids to use, extra capacity and special purposes we have a hard floored 10' Bombard inflatable with a small 9.9 HP Mercury two-stroke.  Since these outboards tend to sip fuel, we will carry a small quantity of extra gas in jerry cans in the swim platform lockers.  This dinghy can be kept fully deflated and only brought out when needed.

A Worthy Lifeboat

We put some thought into what conditions could cause us to need to abandon ship.  For many cruisers in a fiberglass hull, this could be fire, hitting a whale or cargo container, or disastrous weather.  In the case of the Cape Horn, we don't believe the first two are likely scenarios and the weather would have to be truly disastrous of 'Perfect Storm' magnitude.  In these conditions it is hard to imagine how to get into an inflatable, if it even works after all the time in the container, or doesn't blow away in the storm.  We were thinking about this while visiting the shipyard and observed that the North Sea fishing fleets being serviced out of the yard are shifting to an enclosed rigid life capsule shown in the picture. 

We found these are built by Ovatek in the same yard as the Cape Horn 75s.  A little more research found the life-cycle cost is less than a maintained inflatable.  Added benefits are numerous.  Survival gear can be kept inside, yet still be regularly maintained.  A redundant hydrostatic/manual release enables crew to wait out a threatening situation in the lifeboat and only deploy if the ship actually goes down.  Of course the rigidity and buoyancy of this design makes it much more likely to survive a storm that has claimed the mother ship.

We'll mount this with the hatch just steps away from the pilot house door.  If the ultimate disaster were to be encountered, this will give us a real chance of surviving.



 

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Last modified: 10/25/09