Dear Colleagues: any opinions re: the Raymarine radar/gps combination
and the model of choice(C80 vs C120)? Plan to install the instrument
on a rotating arm so it can be viewed from the companionway.
Thanks,
R Smith/Sentient
|
Hi Richard,
We are installing the same Raymarine C80 with 8.4" inch color display that supports the Radar and Plotter and interfaces with the ST60 Instruments. It is WAAS, of course. I can't wait for the MARPA. It is amazing how concerned you can be when you can actually see all those ships out there. With the swing out arm, it is perfect. We have the Garmin 2006 C on that arm and this will be about an inch larger and still fit perfect.
We went with the 2kw 24 mile Radome, because of weight and size. It is 18" and that's about as big as I can imagine on the mast above the staysail tang.
We won't get lost or run into anything! We still hope to sail Aloha to Bermuda this June if we get all this done.
Safe Sailing
Kate Kate Christensen
RogueWave Yacht Sales & Services, LLC.
1806 Dreams Landing Way
Annapolis, MD 21401 USA
410 571-2955 Office
410 703-5008 Cell
801 681-9741 Fax
|
We have all internal halyiards in mast and mast head
electrical cables are in a tube. Where did you run
your antenna cable and how do you keep it clear of
lines? where did you exit cable (below floorboards?)
Nate
====nathaniel berkowitz, sausalito california
tel: 415 331 3314 fax: 415 331 1854
email:nathanielsf@yahoo.com
Do you Yahoo!?
The all-new My Yahoo! - What will yours do?
http://my.yahoo.com
Kate,
Please contact me directly at jhiller@ameritech.net
Jim Hiller
— In bcc@yahoogroups.com , “Kate Christensen” <kate@r…> wrote:
Hi Richard,
We are installing the same Raymarine C80 with 8.4" inch color display that
supports the Radar and Plotter and interfaces with the ST60 Instruments. It
is WAAS, of course. I can’t wait for the MARPA. It is amazing how concerned
you can be when you can actually see all those ships out there. With the
swing out arm, it is perfect. We have the Garmin 2006 C on that arm and this
will be about an inch larger and still fit perfect.We went with the 2kw 24 mile Radome, because of weight and size. It is 18"
and that’s about as big as I can imagine on the mast above the staysail
tang.We won’t get lost or run into anything! We still hope to sail Aloha to
Bermuda this June if we get all this done.Safe Sailing
Kate
Kate Christensen
RogueWave Yacht Sales & Services, LLC.
1806 Dreams Landing Way
Annapolis, MD 21401 USA
410 571-2955 Office
410 703-5008 Cell
801 681-9741 Fax
mailto:kate@r... kate@r…
<http://www.yachtworld.com/roguewave > www.roguewaveyachtsales.com-----Original Message-----
From: ras9463 [mailto:ras9463@y…]
Sent: Friday, January 21, 2005 12:46 AM
To: bcc@yahoogroups.com
Subject: [bcc] Raymarine radar/gpsDear Colleagues: any opinions re: the Raymarine radar/gps combination
and the model of choice(C80 vs C120)? Plan to install the instrument
on a rotating arm so it can be viewed from the companionway.Thanks,
R Smith/Sentient
BRISTOL CHANNEL CUTTER OWNERS ASSOCIATION
Mail List Home: http://groups.yahoo.com/group/bcc
BCC Owners Home: http://www.geocities.com/bccowners
Post message: mailto:bcc@yahoogroups.com
Subscribe: mailto:bcc-subscribe@yahoogroups.com
Unsubscribe: mailto:bcc-unsubscribe@yahoogroups.com
List owner: mailto:bcc-owner@yahoogroups.com
Yahoo! Groups Links
To visit your group on the web, go to:
http://groups.yahoo.com/group/bcc/To unsubscribe from this group, send an email to:
bcc-unsubscribe@yahoogroups.com
<mailto:bcc-unsubscribe@yahoogroups.com ?subject=Unsubscribe>Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service
<http://docs.yahoo.com/info/terms/ > .
|
Nate:
AO Halsey, s/v Polaris Jack, routed the radar cable down a shroud. I have seen this arrangement on gaff rigged cutters. The con is the cable is more exposed to the elements. The pro is the cable is supported most of its length.
We ran our radar cable through Iduna's mast. This requires a 3/4" diameter hole for the cable plug to pass through. In addition, we ran the cable externally in the cabin. The idea behind this arrangement is the cable does not have to be cut when the mast is unstepped. (The array and cable are tuned. Cutting the cable is not advisable.)
Rod
S/V IDUNA
|
The thing I love about this group is the thoughtful level of
discussion on such a wide variety of topics.
Reading this thread, Rod’s discussion of resolution and Kate’s
mention of MARPA reminded me of some recent collisions at sea.
Perhaps the most startling one involved the container ship P&O
Nedlloyd Vespucci and a yacht in the English Channel. From memory:
The yacht was passing from port to starboard across the track of the
container ship. The Vespucci was travelling at 15 kn in very dense
fog. Both vessels had each other on radar and the Vespucci using ARPA
determined that the yacht would pass ahead of them and that CPA was
0.4nm. Some changes of course were engaged in but the basic story
holds.
The Vespucci hit the yacht which then sank. The Vespucci was unaware
of the fact until approached by maritime safety inspectors in Hong
Kong! The yacht crew spent 5 hours in the raft until picked up (!
rather than run down!) by a fast ferry.
The accident report showed that the manual for the Vespucci’s ARPA
system stated that the resolution was less than the CPA reported. In
other words the system was unable to determine between hitting the
yacht and clearing it by 0.4nm. This is not just radar resolution it
is also the target calculation system in the ARPA module.
This is not a solitary event. There have been a number of similar
recent events. The message is beware - your systems can and do “lie”
to you. This is the reason for the advent of AIS which uses VHF to
broadcast position, course, speed and some other data automatically
(try searching SOLAS and AIS).
We had a recent example of this when hove to in a SE gale in Bass
Strait, early last December. Visibility was very bad when we saw the
lights of the 7th close quarters ship! Repeated attempts to raise him
on VHF failed. The the watch officer on one of the fast Bass St
ferries came on and said “I have this vessel on my ARPA plot, the
vessel you wish to speak to is vessel X”. Immediately the vessel in
question broke in and after a short conversation we established that
they would miss us by something under one quarter of a mile.
Later investigation showed that the ferry was using an integrated
combination of ARPA and AIS in order to be able to give us that
assistance.
Just as an aside, of the seven vessels that night (2340 to 0300) two
were fast ferries travelling at 27 knots, the balance freight and oil
rig support vessels. The closest passing distance was 300 feet! I was
having very detailed conversations with that vessel as they made an
emergency turn to stbd. The most distant vessel was 1/4 of a mile.
Despite what COLREGS say about not using VHF as primary collision
avoidance it was vital in this situation. My crew and I were very
busy for a while! (We would see the loom of the decklights and
immediately begin calling ‘unidentified vessel’ most vessels answered
quite quickly however some vessels would not alter course until we
could tell them which of their nav lights we could see. In the
conditions this meant that they were very very close indeed - nav
lights are hard to see in bad vis) We had no radar and painted no
radar echo even though we had a Davis type reflector in the ‘double
catch rain’ position. We were invisible despite a masthead tricolour
light and a very bright torch on the trysail. In future I would hoist
a strobe to the masthead (despite COLREGS) and broadcast the fact,
along with my position in my all ships calls. These calls are very
important. They led to us being called up by vessels as they
approached in order to get an update on our position, or as one
vessel put it “Mate, where are you? I should be right on bloody top
of you and I can’t see you.” We exchanged positions and he was about
a half mile away and ultimately passed closer - we could see him, he
couldn’t see us!
The basic issue was that with the relative speeds - them at 15 - 27
knots and us drifting at 1 knot hove to - we had little if any
capacity to effectively avoid a collision. We couldn’t move out of
the way fast enough to avoid them, given the very poor visibility and
the very difficult conditions (wind consistently around 40 kn and
gusting up to 50, seas very steep and short 4 metres with some up to
5 metres and breaking).
Too busy for me. We’re heading back across on 4 February for the
Australian Wooden Boat Festival in Hobart. There will be at least 6
of Lyle Hess’s designs there, moored all in a row. Hoping for some
better weather!
Regards & Happy Australia Day (Jan 26)
Mike
— In bcc@yahoogroups.com , “Rod Bruckdorfer” <seagypsy@a…> wrote:
Nate:
AO Halsey, s/v Polaris Jack, routed the radar cable down a shroud.
I have seen this arrangement on gaff rigged cutters. The con is the
cable is more exposed to the elements. The pro is the cable is
supported most of its length.We ran our radar cable through Iduna’s mast. This requires a 3/4"
diameter hole for the cable plug to pass through. In addition, we
ran the cable externally in the cabin. The idea behind this
arrangement is the cable does not have to be cut when the mast is
unstepped. (The array and cable are tuned. Cutting the cable is not
advisable.)Rod
S/V IDUNA
I had an opportunity to speak with one of the technicians from one of the larger Bay Area electronics firms this week. I asked what their opinion was concerning Raymarine, Furuno and JRC radar/chart plotters
He said, the positive strong point of the Raymarine units is the ease of operation right out of the box has to be its most rredeemingvalue, less manual time, considered more intuitive than most others on the market, in general, they are a very good unit. Raymarine comes with a lot of bells and whistles at a lower price point compared to others on the market. We didn’t have enough time to delve into detail regarding which models he would recommend for small sailboats.
I asked which manufacturers product he would purchase if he was buying it for his boat and he recommended Furuno. He went on to explain, Furuno is less intuitive than Raymarine, you need more manual time to get aacquaintedwith their products, when comparing bells and whistles, Furuno has less at a comparable price point. The up side is, the Furuno radar chart plotters are considered more durable, their focus is on ssimplicityand durability. The Furuno line had dominated the ccommercialmarket, extending options formerly reserved for the commercial sector to pleasure craft users, so for the customer wanting every bell and whistle, the high end commercial options are available as well .He also stated, Furuno had the fastest repair turn around time in the industry.
I had an opportunity to speak with the technical service center aadviserat Furuno’s San Francisco facility last year, they are a wealth of information, zero sales pressure, focus on finding the system I needed.
We find the Furuno Radar didn’t take as much reading time to get acquainted with the system as we thought, the unit is simple to operate after reading the manual, we seldom need refer back to the manual for anything other than something to do during long days at sea.
We sailed back from Paradise Cove this winter at night, not knowing any better, we chose to approach the Oakland Bay Bridge at the east end between Yurba Buena Island/Treasure Island and Oakland. Bridge construction is underway at this section, the water is crowded with barges ringed with buoys, most buoys are lighted, some are not. With the radar and chart plotter we were able to navigate the maze of buoys, some in very tight quarters, and a few buoys not visible with night binoculars, the Furuno radar picked them all up on screen. We had a few near misses, which otherwise without radar would have been direct hits on unlit steel round buoys.
Best wishes,
Marty Chin