Lengthen Your Catamaran Hulls
Sunday April 1, 2007
In the spring of 2007 we decided to extend the
transoms on our crusing catamaran, Light Wave. The following is the excerpt
form our May and June 2007 Adventure Logs where we detail the work we did in
the boatyard in Guaymas. It took 24 days to lengthen the hulls and then another
27 days to raise the center bridgedeck
cabin 6 inches.
We hope it inspires you to make your catamaran
into a better one.
We started with this:
Last pic of the old transoms before
major surgery.
And ended with this:
..... After 51 days later with hulls extended
and center cabin lifted.
Note clearance under aft
beam on left hand side.
Tuesday, April 24, 2007
After a surprisingly quiet night anchored off El Centro
(downtown) Guaymas, we upped anchor first thing in the morning and motored
the short distance across the harbor to the little cove off our boatyard.
Motoring ashore in our dinghy, we had to tie up next to some Mexican workers
building a new ramp for the boatyard. It has no beach and is deeply dredged
so landing was a bit tricky and a bit mucky. Anyway, we tied up and then
wandered around in Marina Seca Guaymas for awhile, checking out the boats
already on the hard, and looking for Gabriel, the manager with whom Garett
had exchanged emails and spoken on the phone. NB: the Mexican or Spanish
name for boatyard is "marina seca" which means "dry marina".
View of downtown Guaymas (el centro) from our
temporary anchorage before we moved over to the
boatyard side.

We buy lovely fresh vegetables every chance we
get, and enjoy lots of variety. It's great to be
vegetarians in Mexico, though the corn on the
cob here leaves much to be desired.
Eventually, we found Gabriel Larios Rizo, a very friendly
expressive young fellow, who manages the dry marina (boatyard) for his
father who owns the place. We soon realized we had chosen wisely. (Another
interesting aside re the names of the Mexican people: when you ask someone
his/her name, "Como te llama?" he will say his first name. But
if you ask the name of his wife or daughter, he automatically says, "Maria
Dolores", or "Nicole Esmeralda". And in signing their names
or on business cards, these middle names are used.)
Marina Seca Guaymas is very boatbuilder friendly, and
Gabriel is very helpful and accommodating. We arranged to be hauled out
the next day, and confirmed that we will be staying in the yard until
we return to Mexico in September. After I applied a little feminine wheedling
and pleas (accompanied by prescribed batting of the eyes), Gabriel gave
us the code for the secured wireless network. Edgar, one of the boaters
whose boat has been on the hard here for a few months got Gabriel to set
up the wireless internet in the yard, on the understanding he pays for
it. Each visiting boater then pays Edgar a small monthly contribution
to his costs. It's a good arrangement and gives us excellent Skype and
Internet connections for phone calls, emails and researching the Net,
as well as very good connection to our Ares Ultra website from which we
download movies and TV shows. This is a great way to relax after a hard
and long day's work in the hot sun.
We also scoped out locations of stores where we could
get hardware, fibreglass and epoxy materials, lumber and groceries. Gabriel
had no knowledge of laundry facilities, but in response to our query did
tell us that there is a small hotel just down the road. When we visited
it a few days later, I talked to the little old lady who was cleaning
and asked her if she would do some laundry for us. She said she would,
and when I returned a couple of days later with my big load of a month's
laundry, a young guy directed me to a little casa behind the motel on
the beach. There I found Rosaria's husband Chris (pronounced Krees), who
was happy to take my laundry and said Rosaria would have it ready the
next day. For 140 pesos ($14) I got two huge bags of laundry done. For
the benefit of other residents or visitors at Marina Seca Guaymas, I printed
up an information sheet advising folks how to find Rosario to ge their
laundry done. I am sure she and Chris appreciate the extra income.
We caught another basic Mexican bus to town, joining
a throng of Mexicans sitting on rickety seats, gears grinding as the driver
raced pell-mell along, stopping wherever someone wanted to get off ("Bajan!")
or waved him down. It is great fun to ride the city buses in Mexico. We
hear the long-distance buses are very posh, however, and include air conditioning,
television screens at each seat, and washrooms, and look forward to experiencing
them for our 300-mile road trip up to Phoenix Arizona in June.
Wednesday, April 25, 2006
Of all our travels down the coast and in the
Sea of Cortez, hauling out Light Wave in this
very narrow ways, with not an inch to spare
was the most harrowing.
We breathed a sigh of relief once she was
out of the water, but didn't really relax until
she was safely secured on land.
The boat is out of the water now and sitting
75 feet from the office and showers.
This is the plan for our two modification projects in
the boatyard over the next six weeks:
Part 1 ==> Extending the hulls 4
feet, to give more buoyancy, but mostly to improve the boat's movement
through the water--the increased length will help to eliminate the "hobby-horsing"
our short little 28-foot cat had been doing in bigger weather. Plus, as
a boat's speed increases concurrently with its water length (length of
the hulls in the water), our speed should improve. Plus, the aft of the
hulls (as of writing this) are now curved up through that additional 4
feet, so the very end of our hulls (transoms) will be out of the water
instead of dragging in it--this will result in much less noise, meaning
less stress for the crew as noise always causes concern, and less drag
thus more speed.
This pic shows the drag of the existing transoms
in the water: mucho noise, very uncomfortable
and unsettling for the crew, especially in night
passages, and of course slowing us down.

Garett's finger shows how high the water
came up on the transoms. The area from his
finger down was dragging
through the water
slowing the boat, noise, and growth
on the rudder hinges. You can see the
lower hinge in the above photo but
that was only after scraping all the
barnacles off of them. The rudder could
barely turn anymore.
This shows the water mark on the
rudder box as well. Our new transoms are
raised out of the water, following the natural
curve of the existing hull line, and we are
sure they will be much better (mucho mejor!).
Part 2 ==>.
Raising the whole cuddy cabin and cockpit sections 6 inches. Again, this will
give our cat more clearance under the cuddy cabin, and so we will get less slamming
by the waves: less noise and less stress on the crew and on the boat itself.
[Full Story]
Thursday, April 26, 2006
Today was our big shopping day as Barry Squirrell took us around
town to the lumber, hardware, and marine stores in Guaymas and San Carlos.
We paid him in gas, as we don't want to keep several gallons of gas in
the boat while we are away, and he was quite happy. Nevertheless, it was
a terrific help to us, and we really appreciated his willingness to spend
the time take us to the places we needed to visit.
Friday, April 27, 2006 - Work starts!
Last pic of the old transoms before
major surgery.
This is what the transom looked
like at before cutting and modification
with mean looking reciprocal saw.
First cut. "Are you SURE we want to do this???"
We are committed now. The top of one
aft hull/transom has been incised.
The look after first set of cuts.
Saturday, April 28, 2006
Garett cutting things up.
Both sterns cut off....yikes!
What are we doing?
The tongue shaped bottoms
are hanging down.
Sunday, April 29, 2006
The boatbuilder takes a break. This is just
the beginning of several weeks of
intense work.
This is as bad as it looked with the
old stern cut off and the bottom
sliced back two bulkheads.
We are definitely committed
or maybe we should be committed!
The much bigger replacement bulkhead.
Uh-oh! I recognize that smell! Styrene! Here
I am mixing GRP resin again. Takes me back
to our boatbuilding days.
Wetting out our first pieces of fiberglass.
Measuring things up.
I finished cleaning out another sail locker (isn't this
interesting for you folks?), and again swept up all the dust and washed
the floors in our living areas. Continuing my role as chief cook and assistant
boatbuilder, I made a few batches of fibreglass resin for Garett, and
also made breakfast and lunch. We had our afternoon siesta after lunch,
and a bit later I made a huge potato carrot salad as well as a quasi-Greek
salad. Quasi because the Mexican lady at the big Ley's supermarket who
sold me a big hunk of what she said was queso feta (feta cheese) in fact
sold me the regular boring white Mexican cheese. And we all know that
Greek salad is totally dependant on the tangy flavor of good feta cheese.
Anyway, the reason for all this preparation was the regular Sunday night
group barbecue in the boatyard. We all bring a contribution, some bring
their portable barbecues plus fish and meat, and then we share and celebrate
life on the hard.
Beautiful sunset at the boatyard.
We are in an amphitheater of surrounding mountains.

Garett with our new friend and volunteer chauffeur,
Barry Squirrell. Barry lost a few inches in height
when he was injured when he and his mate Toni
were sailing back from Guam and the boat pitchpoled .
They spent 142 days at sea in a jury-rigged boat.
Full Story
Monday, April 30, 2007
Inside of one starboard mold.
Tuesday, May 1, 2007
Garett: We really tried to wake up at 5:30
am attempting to beat the heat, but instead slept into 6:30 am. Sunrise
is at 5:45 am. We started work at 8:30 am and completed the forms for
the hull extensions. I then spent a couple hours cutting out all the pieces
of mat and bi-axial. As we approached lunchtime and in the heat of the
day (90 F) I realized we need some more fibreglass material, so we decided
to go into town after our siesta.
We caught the Paraje bus but this own was even older
than the other ones we had been on. We sat in the back and were bouncing
up and down on every revolution of the back wheels. I don’t think
the wheels were round any more.
This is a local bus when stopped....
...this is the bus when it starts moving...
It is bumpy!
When we reached downtown we realized it was deserted
as it was the May 1st holiday. We still got some fruit at the super mercado
but the Plastico y Resina store was closed. We got back to the boatyard
at 6 pm and did out first combo fiberglass job of the first hull side.
Taping the edge recesses in the mold.
Reminds me I need to lose weight!
Carllie inside the mold putting
on the edge recesses.
The molds ready for glassing.
The little kitten we adopted for
5 days until we found her a home.
Full Story
Saturday May 5, 2007
Garett: Today is the day of the monthly Boaters Swap
Meet at the San Carlos Marina. Carllie though it might be an opportunity
to find a home for our new calico boat kitty.
We woke up at 7 am and Carllie got the cat carrier that
our friend Jason had given to us, bag of cat litter, 4 cans of Whisker
cat food, and the leftover flea removal drops and dewormer pills, and
of course little Maggie and got a lift with Ted from the boatyard.
Play time.
After they left I sure missed that cute little kitty.
It had only been four days and that kitten had become part of our boat
team. I could still see her perched on the aft beam quietly sitting and
looking at us fiberglassing for two hours in the dark.
Maggie fascinated with our late night
fiberglassing work.
I would periodically break from my work
and meow at her and she would always meow back. I sure miss her…
But it would have been harder if we waited another five weeks until June
18 when we leave.
May 2 to May 4, 2007
Molds just about to be pulled off.
Outside molds pulled off the new hull additions.
Doesn't look very promising yet, does it? Garett
envisioned every step of the procedure, and
reassured me.
View from above of added starboard section.
Complicated jig holds the new stern firmly in position
until we can glass in the sole, the stringers, and
the bulkheads.
Trying to level everything.
Another session 'glassing late at night
when it cools down.
Sunday, May 6, 2007
Carllie: Life in a boatyard is fun, whether it is at home or here in
Mexico. It's a little more fun here because we have befriended the Mexican
workers in the yard, and the young Mexican Gabriel fellow who manages
the place for his father and lives on the property with his wife and son.
Temperatures when we arrived, April 22nd, were about 85 degrees F during
the day. Now the temperatures have gone as high as 103 degrees, though
for the last several days it's been "cool" at between 90 and
96 degrees. It's amazing what you get used to. Thankfully, temperature
drops in the evening so far, allowing us to get a good night's rest.
New friend, Steve Rankin, from Comox.
As of today, after about 8-9 days of buying supplies and Garett’s
almost non-stop work with my assistance with decisions along the way,
all ‘glassing, and of course feeding the workers, these extensions
are really taking shape. You will see when we update our website the progressive
stages of the project and how at first the additions looked pretty awkward
and weird. Now they fit right into the natural lines of the hulls. We
think Light Wave will look much better with these extended hulls.
The sides and stern being held together.
Partial mold of white melamine
particle board for small lower sections.
Jig to hold stern in position before gluing
in the floppy bottom which is
lying like a big tongue on the ground.
Monday May 7, 2007 to Friday May 11, 2007
The bottom of the hull bottom
folded up and 'glassed in
The day after the underside is 'glassed in
and trimmed up. Looking much more promising!
Gabriel who runs the boatyard for his father,
with his wife Maria Dolores.
Carllie at her mixing station.
Gabriel's and Maria Dolores's shy,
blue-eyed son Isaac.
Little filler pieces had to be 'glassed
onto white melamine molding board.
Wednesday May 9, 2007
Today was an open market downtown, and so we bussed there
in search of a used reciprocal saw (commonly known as a "Sawsall").
We did find a really good Milwaukee sawsall for only $70; it would have
cost over $200 new.
The open market.
You want tools?
This is the place.
Missing a socket from your socket wrench set?
Does your child want a stuffed animal? Need
company for those lonely night-time passages?
Crowded main sidewalk on Serdan Street where
we caught the bus to San Carlos. School kids get
out at about 1 or 1:30 and they packed the
sidewalks waiting for their buses and flirting
and laughing with each other.
Shoreline road to San Carlos.
It is about 10 miles and 1 hour of bus rides
to get to the only marine store in the area.
We can get general lumber, hardware,
and stuff just a few minutes from the yard.
Zyranja and Carllie at the Star Marine Supply store.
Mother and her happy daughter on the bus.
It is interesting that most mothers in Mexico
stay home with their children. Less money,
but better upbringing!
More cutting.
Late night 'glassing.
I spent two days making
the frames for the decks.
Fitting the new decks.
King of the mountain. Our new
helipads almost looking good!
Saturday May 12, 2007 - Typical Builder's Log
by Garett for Day 16
Garett: Today's jobs done:
- Woke up really early, before it got hot, and glued
in all 32 pieces of hull framing with Carllie
- Glued on all 9 oz cloth to both sides of new decks
- Glued in reinforcing for swim ladder
- Filled in all screw holes on floor frame
- Faired transoms
- Took apart rudder hinges
- Drilled oversize holes for hinges so ready to be epoxy
filled.
Midnight update
I just woke up from a little nap after falling asleep
in the middle of a video which we tried to watch after eating another
one of Carllie’s great dinners.
Today was another day of progress even though it is getting
very very hot.. We woke up early at 6 am so we could get and early start
to glue in all the pieces that make up the frame for the floors. Carllie
was mixing the epoxy and then adding the special 406 filler (glass bubbles)
in small batches with the slow hardener and then I coated the glue edges
of each piece (32 of them which I cut and fitted yesterday). We are seeing
some visible progress and we think that the boat will actually look better,
as well as have the real benefits of less hobby horsing, better speed
and less noise.
Our usual daily routine is to work from 8 to 2 pm and
then take 2 hour siesta break in the heat of the day and then work from
4 to 8 of 9 pm. The temperature hit 101 F by noon and it is too getting
hot to sleep in the afternoon. My new strategy to deal with the heat is
to soak my shirt, shorts, and hat in the sink every hour and this keeps
me cool as the water quickly evaporates in the super dry air (only 20
% relative humidity).
The finished gluing job x 2 hulls.
We have now been out of the water 17 days and we have
another 36 days left. This gives us 8 days to finish the transom modification,
then 3 weeks to the lifting of the cuddy cabin and cockpit, and then 1
week to prep the boat for the 3 months left alone in the summer. I think
we will still make it. This modification of the transoms is a significant
modification as it turn out we are adding 4 feet to the boat which is
13% increase. Though all this has been a lot of work Carllie and I both
agree it is far less work than building a bigger boat. We just don’t
think we have the energy in us to it. Life is too short. The meter is
ticking down in life.
Well I am going to spend a half hour working on my article
for Multihulls Magazine on adding the hardtop and arch that Carllie is
after me to finish by our May 15th deadline and then it is off to bed
and see if I can wake up at my ambitious 5 am wake up. Goodnight everyone!
Another long day.
Tuesday, May 15, 2006
Carllie: A whole week has
passed, and Garett has almost finished his incredible job of extending
the hulls. He has done a fantastic job. The extensions are very sturdy
and of course the lines of the extensions continue on naturally from the
original hull lines. We have included two bulkheads in each extension,
one being the original transom of the hull, and the second being in the
middle of the new section. These bulkheads, in addition to the stringers
Garett glued in along the centreline of the hull sections and along the
sides, considerably reinforced the plywood reinforced fibreglass extensions.
Garett spent two days building the deck tops for the new sections and
'glassing them on both sides, and two nights ago we attached them to the
stringers on the hull tops with epoxy glue. The extensions were now very
strong indeed, no flexing whatsoever. Then last night, after Garett had
again shaped the sharp edges of the new hull tops with his grinder, we
wrapped the joins with biaxial roving cloth and epoxy. At this very moment,
Garett is grinding again, in this Tyvek coverall in the 88 degree F. heat,
continuing the fairing process smoothing the epoxy fairing compound he
has been applying to the new sections. The object is to get the new sections
as fair as possible, then make diagonal lines between the original hulls
and the new sections and paint the new sections with whatever yellow paint
we can find in the local paint stores here. Here we cannot get our high-quality
System Three yellow paint that will exactly match our existing paint,
so this will be stop gap until we get Light Wave home. Next time
we haul out in Vancouver, Garett will use his big professional sanding
block (2 feet long) to fair the extensions perfectly, and we will repaint
them with the right type and color of yellow paint.
The first bit of blue fairing
compound on bottom.
Holes over-drilled and filled with epoxy
for the rudder hinges.
Top grid of stringers glued in and
ready for decking.
Deck ready to be glued on with the help
of 60 temporary screws (and the Boatbuilder's Wife!).
Carllie mixing epoxy late at night
when it is cool.
Carllie: Light Wave looks noticeably more streamlined
with the additional length already, even though the extensions haven't
been painted, as you will see in the pictures. So once we get them painted
a close shade of yellow, she will be looking pretty good. Already this
is feeling like one of those many improvements we have made on Light
Wave where we will be saying, "Why didn't we do this earlier?"
Of course, we didn't even think about extending the hulls until we were
in Mazatlan in January visiting with our friends Joe and Kathy aboard
their lovely Seawind 34 cat, Katty Kat. Joe told us that the
Seawind company is now doing extensions to the Seawind 34's, extending
the hulls by 3 feet to make the ride more comfortable. At that point the
light went on, and over the next couple of months it brewed in Garett's
mind until ultimately it percolated into the defined vision of extending
Light Wave's hulls 3 feet (in reality closer to 4) in addition
to raising the cuddy cabin and cockpit when we are on the hard in Guaymas.
It seems an extreme modification, but Garett visualized
it all step-by-step very quickly and, just like "cutting out the
cuddy cabin and cockpit", he was confident we could do it in a short
period of time on a small budget (muchos smaller than the $10 or $20,000
the Seawind Company likely charges Seawind 34 owners to do 3-foot hull
extensions!). Garett's capability and tenacity amazes me daily. He created
a detailed list 3 pages long of all the steps involved in building these
extensions, about 70 steps in all I think, and we are now down to the
last 3 or 4 steps. He works every single day, getting out of bed very
early and inspecting his work from the day before, and working almost
all day long with a lunch-siesta midday. I usually work with him once
the sun goes down doing GRP resin or Epoxy resin mixing, brushing and
rolling with him at a very very fast rate. There we are, out there in
the dark with our trouble light, the cockpit light and a headlight (like
the Borg!) that I wear so I can see what I am mixing, brushing and rolling.
The two friendly boatyard dogs, Sassy and Lobo, meander over nearby and
we talk to them a bit. Then we chat with the night watchman, Isaac, in
Spanish of course as the only Mexicans here who speak English are the
manager Gabriel and his wife Maria Dolores. Almost all the other "Norte
Americanos y Canadienses" have left now, but still one or two will
come by and comment on our industrious work so late at night. It is far
easier to work in the evenings, however.
The great thing about our situation is that at our request
Gabriel positioned the boat right between two other catamarans (we did
not want to be around any monohulls that can topple over in a hurricane),
and we happen to within eyesight of the night watchman's little building,
directly across from the washrooms and showers, and also right across
from the office. So security is very very good, and the accessibility
to the showers makes it that much easier keep cool during the day with
two or three showers, and one final shower after our late night 'glassing
sessions. Then we retire to our cuddy cabin to watch some movie or TV
show we have downloaded with the great wireless Internet connection we
very fortunately have here. We contribute a measly $10/month towards its
expense, and feel it is well worth it as we can also enjoy making long
Skype phone calls to our friends, and receiving and send emails and completed
articles easily. Last night we just finished polishing up Garett's next
great "how to" article for the July-August issue of Multihulls
Magazine, entitled "A Hardtop for the Working Cat", and
sent it out with 14 photos via email lickety-split. Ahhh! The joys of
technology. As long as you don't have to be physically a part of the world
that creates it, that is!
It is now 12:09 p.m., and Garett has spent about an hour
grinding while I've been writing. He is into the tostadas and wonderful
Herdez salsa sauce, so it's time for me to make lunch! My chief roles
in this boat modification process are to keep the boat swept of dust as
much as possible; gradually clean out the interior of the boat readying
her for our absence while she is alone on the hard; mix GRP resin or epoxy
resin, brush and roll onto matting and roving; and most importantly buy
groceries and feed the designer builder! What a guy! You folks won't believe
the difference in Light Wave when we sail down the Fraser River
to our home marina next July! Will any of you be on a boat to meet us
in the Gulf Islands, we wonder? It is possible to charter boats, you know!
Wouldn't that be great??? There's a seed planted.
The real nasty fiberglass grinding
needs a special suit
so I don't get the itvhy fibers on me.
Light Wave at sunset looking more like a boat
again.
New sterns in the final (but seemingly interminable)
fairing stage.
Garett doing more sanding...
Sunset in the boatyard.
Thursday May 17, 2007
Garett: It has now been 21 days into our "little"
project and the last three days has been the hard work of fairing the
hull extensions. This means applying dozens of small batches of filler
and then sanding it off with a combination of power sander, board sander,
and hand sanding, getting hull additions progressively more level and
fair. Hard work. By the time we have dinner at 8 pm I am really tired.
It looks like we will do some painting in next few days.
...even more sanding...(great for the stomach
and arms!)
Applying even more fairing filler...
Saturday May 19, 2007
Garett: The fairing is almost done. My arms can't take
much more. (C: His hands were so sore last night that while we watched
a video I spent about an hour massaging them with a special cream.) Just
a little more this morning and then we can put some primer which will
at least change the color to something else other than fibreglass and
fairing brown.
Garett painted on a special grey epoxy barrier
below the waterline.
We are now down to 29 working days before we take the
bus to Phoenix on Monday June 18. I hope we make it.
Sunday May 20, 2007
The fairing is now done and we finally put on some primer.
Nice white primer.
Yellow still to come.
Though it would have been nice to have been out for the
three last weeks cruising to some of the anchorages in the northern Sea
of Cortez, we both agree that it has been better to do the boat work now
while it is still is reasonably cool. We will then be able to relax over
the summer and be all keen and ready to go in September when the water
is even warmer than it is now.
On the Water Testing
We now have sailed for two months on our longer hulls
and all we can say is that it feels it like a different boat!
The longer hulls dampen the pitching going upwind, downwind, and, surprisingly, at anchor.
Not only is their less pitching but with less pitching you also get less acceleration and deceleration
with each pitching eprisode.
The upgrade project was a lot of work but we are very happy with the changes. We may even
add a few more feet when we get back to Vancouver in 2008.

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