The best laid plans....
Health issues (David) have laid waste to our summer cruise plans.
Hopefully, we'll get out on Pelagia for some shorter trips later this summer....
We are constantly torn between the mountains and the sea. This blog is an account of our sailing adventures, both in British Columbia/Haida Gwaii, and to Mexico (2013-2015), as well as our mountain adventures (including skiing in the Winter, hiking in the Summer/Fall, and trekking in Nepal). Hopefully this blog will provide you with helpful information on these topics (in addition to documenting our adventures). Welcome!
The best laid plans....
Health issues (David) have laid waste to our summer cruise plans.
Hopefully, we'll get out on Pelagia for some shorter trips later this summer....
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| Zihuatanejo harbour (O-Charts & OpenCPN) |
Best charting package: OpenCPN
(when combined with charts available for OpenCPN)
I have long touted OpenCPN. It is the most (or among the most) full-featured charting packages. It is continuously being updated/upgraded with new features, and support easily obtained.
My favourite OpenCPN features:
This open-source charting package is available free for PC, MAC and Linux, and for a very small one-time fee for Android. (Due to Apple's iOS licensing issues, OpenCPN is not available for iPhone or iPad.)
Best source of charts for Mexico's Pacific Coast: O-Charts
I've recently had the opportunity to review the O-Charts (Open Charts) Mexico charts. I've focused on the Pacific coast.
(1) O-Charts' SEMAR charts:
A new addition, O-Charts now offers official Mexico charts from Mexico's SEMAR. Charts are in two sets, one for Mexico's Pacific coast and the other for Mexico's Gulf of Mexico coast. Each chart set is offered for a very reasonable price (26 to 30 euros/set), which includes free updates for 1 year (update frequency is reported to be weekly). Most of these charts are fairly recently issued and/or have received recent updates. They are not old charts "from the 1800s" so often alluded to by misinformed cruisers.
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| SEMAR (O-Charts): Entrance to Sabalo (Mazatlan) |
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| SEMAR (O-Charts): Sabalo (Marina Mazatlan) |
Commercial chart sources, such as Navionics and C-MAP, all obtain their Mexico chart information from SEMAR. Sometimes these commercial charts include data from both vector and raster from SEMAR are included, other times only vector.
However, it is important to note that SEMAR data (and thus Navionics/C-MAP) usually does not cover popular small-boat anchorages.
The solution is to add Blue Latitude charts, as shown in the following example for Isla San Francisco, below:
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| Navionics: no data for Isla San Francisco |
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| SEMAR (O-Charts): no data for Isla San Francisco |
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| Blue Latitude (O-Charts): Detailed chart for Isla San Francisco (from guidebook) |
(2) O-Charts' Blue Latitude charts:
O-Charts has for some time offered the two Blue Latitude chart sets for the Sea of Cortez and Pacific Mexico (36 euros per set). These chartlets, found also in the excellent Blue Latitude guidebooks, provide GPS-accurate charts for all the main harbours and hundreds of small-boat anchorages on Mexico's Pacific coast (excluding the west coast of the Baja peninsula). NO other charts provide such detail.
These charts are essential for west coast cruisers.
For cruisers, the combination of SEMAR and Blue Latitude charts, both available from O-Charts, provide excellent coverage of Mexico's Pacific coast.
The two important exceptions:
O-Charts SEMAR Pacific chart set is missing detailed charts for two key locations for cruisers on the west coast of Baja: Turtle Bay and Bahia Santa Maria/Bahia Magdalena. Unfortunately, these locations are not part of the Blue Latitude chart sets, as they do not cover Baja's west coast.
There are easy solutions for charts for these two Baja locations:
* Note: Navionics/C-MAP do not provide more detailed charts (compared to O-Charts' SEMAR) for other areas of the west coast of Baja. For the many poorly charted locations on Baja's west coast, I recommend making detailed satellite images (mbtiles are best) using SASPLANET/SAT2CHART and OpenCPN.
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UPDATE/COMMENT: This post concerning "CM93" charts is proving to be very popular. It must be noted that CM93 Version 2 charts are usually far from being "up-to-date"; certainly NOT the best charts"available, so users of these charts must be cautious. Often, they are totally out-of-date, and dangerous. In some cases, C-MAP or Navionics electronic charts (which are fairly inexpensive on Android and IOS platforms) may be more accurate. However, as we have noted in other posts, Navionics or CMAP charts may also not be fully up-to-date.
NOTE that Mexico's SEMAR issues new charts every year (as well as updates). For example, in 2018, SEMAR issued a new, detailed, chart for the islands in Bahia de La Paz. (Unfortunately, this chart is available only as pricey paper chart or Raster, and not in their vector/ENC collections (such as excellent O-charts).
THIS POST offers the best solution for electronic charting in the west coast of Mexico: OpenCPN, O-Charts Pacific Mexico, and Blue Latitude garbour charts, plus a couple SAT2CHART/SASPLANET charts to fill a couple "holes".
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CM93 vector electronic charts, covering the whole world, are shared widely among cruisers; they are also available from some sites on the web. Technically, these charts are "pirated", so user beware....
[Note: By "latest", we mean the most recent CM93 available which works in OPENCPN]
CM93 "version 2" charts are easily used in the open-source, freely available, OPENCPN navigation program (CM93 "version 3" charts do not work in OPENCPN).
When we were planning to sail to Mexico, a cruising friend gave us a copy of the CM93 charts. We were impressed that they covered the globe; we were less impressed when we saw their lack of detail. This was especially the case when we left the highly accurate (and free) raster charts of the USA and entered Mexico. In Mexico, we quickly learned (i) our CM93 charts were nearly useless, (ii) our updated CMAP charts (on our chartplotter) were much better, and (iii) in many (most?) places, even our up-to-date CMAP charts provided insufficient detail.* As we note in our earlier blog posts about charts and guides (as well as comparing official Mexican SEMAR charts with CMAP charts), we did not feel confident navigating close to shore until we reached Cabo San Lucas where we could finally use the excellent Blue Latitude Press cruising guides, with their excellent, detailed chartlets and accurate waypoints.
[*Our experience with Navionics charts in Mexico indicates they suffer similar problems as CMAP charts; indeed, we note areas where CMAP has important detailed updates not found in the Navionics. See our blog posts concerning CMAP, Navionics and SEMAR charts.]
It turns out, we were using a very out-dated version of the CM93 vector charts, dated mostly before the year 2000. Since returning home, we have found CM93 version 2 charts dating as late as 2012. The differences (improvements) over the years are substantial.
To help other cruisers, the examples below show the improvements in the CM93 charts for the years "2000", "2007" and "2012" (dates are approximate).
Turtle Bay/Bahia Tortugas (Baja California Sur)
Our first real experience with CM93 charts coming in to an unfamiliar bay.
Our circa-2000 CM93 chart was useless: no details, no depths, and the datum way off (on the other hand, the CMAP turned out to be pretty good).
The circa-2007 CM93 has much more detail and correct datum, although lights were not correct.
The circa-2012, CM93 chart shows an outline of the Marinas in the Sabalo Estero, but with few details. Fortunately, the combination of our CMAP charts and the Blue Latitude Press Pacific Mexico guide gave us the information we needed.
Other places in Mexico where CM93 2012 charts are inadequate (or useless) compared to official SEMAR charts:
The list is too long.
But, for example:
Puerto Los Cabos (San Jose del Cabo): nonexistent on CM93
Marina Coral (Ensenada): nonexistent on CM93
Marina Costa Baja (La Paz, BCS): nonexistent on CM93
"The Islands", Bahia de la Paz (new (2018) detailed chart): nonexistent on CM93
Topolobampo: details nonexistent on CM93
Bahia de Altata: details nonexistent on CM93
Marina at La Cruz and Paradise Marina (Banderas Bay): nonexistent on CM93
The list goes on and on....
CM93 charts in Canada?
After seeing these large changes (improvements) in the various versions of the CM93 charts, we wondered how the CM93 charts would look in our home waters in British Columbia.#
The circa-2000 CM93 charts are terrible for BC waters, even on the south coast of BC (even though most areas in 2000 were exquisitely charted by the Canadia Hydrographic Service (CHS) as well as preceding (mostly British) cartographers). However, by 2012, the CM93 charts are quite good.
Further north in British Columbia, there remain "pockets" of unsurveyed (or poorly surveyed) coastline -- almost all well away from typical routes. One area is "Lady Trutch Passage" on the Central Coast near Bella Bella. This passage always looked inviting, but was choked with narrow passages and no chart was available. However, in 2011, the CHS produced a new very detailed chart including Lady Trutch Passage. Interestingly, the circa-2012 CM93 chart includes this detailed information; the circa-2007 CM93 chart as a subset of this new charting; and predictably, the circa-2000 CM93 "chart" is hopeless for this area, even for the relatively well-traveled (and well-charted for years) "Perceval Narrows".
| Circa-2000 CM93 "chart" for Lady Trutch Passage area: USELESS |
| CM93 "2007" chart for Lady Trutch Passage area: VERY incomplete |
| Pretty good, detailed CM93 "2012" chart for Lady Trutch Passage area |
Obviously, anything "new" since 2012 (marinas, rocks, shallows, buoys... etc) will not be correct on the "latest" CM93 v2 charts (approx 2012).
(# Legally, in Canada, vessels must carry up-to-date CHS charts, so technically, circa-2012 CM93 charts are not sufficient; of course, neither are CMAP or Navionics charts.)
Before we sailed down to Mexico, we wish we had been aware of the substantial changes in the CM93 electronic charts. We should have been... but we were probably too wrapped-up in too many things as we prepared to sail to Mexico, and as were were on our way down the coast.
Hopefully, some cruisers heading offshore will find this blog post helpful!
| Briefly @ Ensenada Los Muertos (photo by SV Confidence) |
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| "The Fleet" for Muertos to La Paz overnight sail (from SV Green Panther blog) |
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| Arrival at dawn to La Paz channel (Pelagia shown, following Green Panther) -- from SV Green Panther blog |
| Puerto Magdalena (Man-O-War cove) |
| Rounding Cabo |
| More Cabo |
| Anchored in Bahia Santa Maria |
| Boats at Santa Maria (photo from SV Confidence blog) |
| Pelagia at Santa Maria (photo from SV Confidence blog) |
| Turtle Bay anchorage |
| "Downtown" Turtle Bay |
| Turtle Bay's "moonscape" |
| Leaving Ensenada |
| Approaching Cedros Island at dawn |
| Mariner's Basin, Mission Bay |
| Looking down at Cat Harbour |
| At the top |
| Sweaty at the top -- Isthmus Cove in background |
| Ithmus between Cat Hbr and Isthmus Cove |
| Pelagia is down there |
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| Hike route |
| Tom Jones and his entourage |
| Tom belts out a mean "Delilah" |
| Pelagia & Marova at Marina Del Rey municipal docks |
| On a mooring buoy, Isthmus Cove, Catalina |
| Pt. Conception lighthouse |
| Cojo anchorage |
| Leaving Morro Bay -- WITH wind! |
| Pelagia (2nd from right) anchored off Avila Beach |