WHAT'S THE ANSWER TO BETTER BOAT DESIGN?
Boat owners are sometimes puzzled by the logic of how their boats
are designed and built. If men are from Mars and women from Venus,
to borrow the popular self-help concept, some wonder just what planet
certain boatbuilders are from.
A recent
discussion on the BoatU.S. message board (my.boatus.com/forum)
focused on five specific areas that cause owners the most consternation:
leaks and drainage problems, limited access to engines and other mechanical
systems, poor quality or inadequate fittings and finish, non-ergonomic
designs and the conflict between seaworthiness and style.
For expert reactions
to these comments, BoatU.S. asked naval architect and marine surveyor
Jack Hornor of Annapolis, MD, Mike McGlenn, a marine surveyor in Bellingham,
WA, who formerly worked for Uniflite, and Pat Kearns of Naples, FL,
a surveyor and former assistant technical director of the American
Boat & Yacht Council, for their thoughts.
LEAKS &
DRAINAGE ISSUES
Questions:
• Why is it almost every boat I have ever seen has leaky windows?
• Does it cost that much more to bond the rubrail joint more
frequently, or at least use a couple more tubes of caulk?
What the experts
have to say:
Jack Hornor (JH): This is typically a quality control issue rather
than skimping on caulk for economy sake. Windows shouldn’t leak
when they are new and if they do this is a quality control issue,
but they can’t be expected to be leak-free forever. Every five
to 10 years it should be normal maintenance to recaulk fittings, windows
and hardware.
Mike McGlenn
(MM): The rubrail is actually the hull-to-deck joint on most boats.
It should not leak. Often the drilled holes are in the wrong place
and don’t get filled. The gunwale guard needs to be sealed top,
bottom and at the screw line. Often one or more of these steps is
left out.
Pat Kearns
(PK): Even entry-level boats are generally well built with watertight
integrity of hull-to-deck joints. However, that integrity can be disturbed
by repeated impact with docks, pilings, other boats and normal dynamics
of sea action.
Question:
• Why doesn’t my boat have an automatic bilge switch and
why does it have just one wimpy little pump that is so slow it could
not keep up with anything above rain drizzle?
What the experts
have to say:
JH: Bilge pumps in recreational boats are only intended to remove
normal accumulations of bilge water and sea spray. Even high-capacity
systems are almost never designed to maintain a vessel afloat in the
event of an emergency.
MM: The
majority of pumps in smaller vessels are for what I call incidental
water, like rain or a shaft log drip. They are not big enough to handle
a serious leak. When real water is coming aboard, you need either
a portable pump or an engine or generator driven one.
LIMITED ACCESS
Questions:
• Why is it that boats are constructed in a way that won’t
allow you to fix or replace anything without having to cut a hole
in the fiberglass to access it?
• I want to get to my water pumps, belts, spark plugs and batteries
without having to crawl on exhausts. Do I have to hire a “vertically
challenged person?”
What the experts
have to say:
JH: Production boat builders build what the public buys. If the
buyers demand a 28 ft. express cruiser with galley, microwave oven,
air conditioning, auxiliary generator and overnight accommodation
for six, access to something has to be limited.
PK: These
are the things that so often make my job as a surveyor so difficult.
When changing the oil in two inboard engines and a generator requires
a human being with the arms of an orangutan and the I.Q. of a genius,
something is wrong.
POOR QUALITY
FITTINGS & FINISH
Questions:
• Why do builders use foam-backed headliners in the cabin? With
the heat the foam disintegrates and the headliner starts to come "unglued".
• Why put carpeting in storage lockers where wet gear will be
stored or will be soaked if it rains?
What the experts
have to say:
JH: I too think it’s a dumb idea for lots of reasons, but
put two boats side by side that are otherwise identical except one
has carpeted lockers, and I’m willing to bet good money that
the one with the carpeted lockers sells first.
MM: Carpet
and padded liners make it very difficult to properly survey a vessel.
You simply can’t access bulkhead tabbing, cabin sole to hull
tabbing or locker tabbing [i.e., connecting reinforcement] with carpet
and padded vinyl covers. But it gives the boat the “wow”
factor.
PK: There
are lots of options for cabin liners and it’s all about dollars.
I don’t see droopy liners in top end boats.
Question:
• Why are plastic through hulls used on boats that cost more
than $150,000?
What the experts
have to say:
JH: Actually there is nothing wrong with plastic through hull
fittings if they are good quality and designed for their intended
use. It could be argued they are better below the water because they
are not subject to galvanic or stray current corrosion that often
causes failure of metal fittings. Still, UV deterioration is a major
concern for plastic fittings above the waterline.
Question:
• Why is it that fittings that are under or at the waterline
do not have two hose clamps?
What the experts
have to say:
JH:
Actually it’s an old wives’ tale that there is any standard
or practice that requires two hose clamps on all fittings below the
waterline. It may be good practice for hoses that are fit onto smooth
pipe but it is not necessary for barbed fittings.
MM: Back
in the early days, most hose clamps were steel and corroded readily.
Having two then made more sense. Today with the good quality stainless
steel clamps, the second clamp is not as critical as in days of old.
PK: Another
myth to be busted. There are only two places where double clamps are
required on boats: the fill pipe on a gasoline fuel tank and the hose
connections for a marine wet exhaust system.
ERGONOMICS
Questions:
• Who decided to locate the battery on/off switch underneath
the rear cockpit seat so you have to get down on your knees to turn
the switch on or off?
• Why is it that consoles are made to be comfortable ONLY when
you're standing up? When you sit on the helm seat your back is bent
over at a 45° angle, which is not comfortable.
• The forward stateroom in my boat is so small that you cannot
get to the sides of the berth. Did the designer really intend for
me to jump up on the foot of the berth and crawl forward?
What the experts
have to say:
PK: Easy fix for the console seating problem. Tell ‘em you
won’t buy a boat that doesn’t fit your “seat”
or whatever it is that doesn’t fit. Vote with your dollar. It’s
an amazing power.
There is a tendency to want to put that battery switch as close to
the batteries as possible, so we feel that “compromise”
word creeping in. Long runs of heavy battery cables are expensive
and dangerous unless provided with the appropriate overcurrent protection.
We also want to avoid putting those switches in the engine space because,
if there is a suspicion of fire and you want to shut down the 12V
system, you don’t want to be opening the engine space, possibly
providing a huge does of oxygen that fire needs to flash, to get to
those switches.
MM: The
builder should get out of the office, take a 3 or 4 day cruise and
really use the whole boat, then come back with his punch list. The
new crop of boats appears to be designed and built by committee, the
accountants and people with no practical experience. A one-hour photo-op
won’t do it.
Question:
• Why is it that boats have unsturdy or undersized bow railings
or railings that don't leave you with enough support to actually hold
onto them, or offer little protection from actually going over the
side of the boat?
What the experts
have to say:
JH: ABYC Standard H-41 establishes some good standards for deck
rail height and a minimum of 400 lb. static load test, at any point
and in any direction. I suspect that a good percentage of production
builders products would fail if actually put to the test.
PK: This
one is a no-brainer. Any boat touted as NMMA certified should have
complying railings.
SEAWORTHY
VS. STYLISH
Questions:
• Are boat engineers/designers really boaters? Do they ever
use the boats they design?
• Minor feature overload is my pet peeve. Do they really believe
that 28 cup holders will sell a boat?
• Who comes up with the backwards “standard” features?
For example, the VHF, engine sync and trim tabs are optional but the
blender, 6-disk changer and cooler are standard!
What the experts
have to say:
JH: I really like this last comment and I hope no one will mind
if I use it some time in the future.
PK: As
for the cup holders, they think that’s what you want because
it’s a popular feature in cars. Most of this kind of design
excess (sacrificing good design input) is market driven. You are the
“market.” Change horses. Product that doesn’t sell
speaks volumes.
Marine
industry is silent…
BoatU.S. was curious
to know how major boat manufacturers would react to these comments,
coming as they were, from their customer base. To our surprise, not
one boat builder was willing to respond.
As the industry’s
“Grow Boating” campaign gets under way, acknowledging
concerns such as the ones our boaters shared would be an important
sign that someone is listening.
(c) Copyright
BoatU.S. Magazine, March 2005 |