This query is for our tall-masted friends. Captain Tilley is considering reducing his 65ft schooner’s mainmast air draft of 85ft to a height compatible with Waterway bridges. He welcomes your input and suggestions. You may respond here or directly to his email: joseph.tilley@ymail.com. Many thanks!

Larry
Thanks for the information. And yes if you could pose the question on the form that would be great.
Looking to reduce our masthead height so we can safely transit the ICW.
Looking to cut mainmast down to 64 feet and want to know if this is sufficient.
Thank you!
Joe Tilley
Captain
Schooner Liana’s Ransom
Halifax, Nova Scotia, Canada

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BoatUS Member Services Locator

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The article below by John Hersey of Survice Engineering provides a thorough description of the technology of ARGUS and its application for boaters. SSECN is proud to be a pilot program utilizing ARGUS as part of our full Chart View feature. If you have not begun to use ARGUS, please open one of our Chart View charts, click the ARGUS button in the top menu and the depth indicators appear automatically. The indicators are best viewed zoom in.

THE GLOBAL MAGAZINE FOR HYDROGRAPHY
WWW.HYDRO-INTERNATIONAL.COM
NOVEMBER/DECEMBER 2014 | VOLUME 18 NUMBER 8

Leveraging Technology and Social Media for Intracoastal Waterway Reconnaissance
Crowdsourcing Enhances Navigation Awareness

In this internet age, crowdsourcing is fast providing practical contributions to our understanding of the
world around us. Whether it be software developed in an open-source environment, inputs from ‘˜those in
the know’ to create and maintain wiki pages, or the provision of weather and traffic data through the mobile
devices we use every day, society as a whole benefits from what we each ‘˜know’ and the ability to
communicate that information with today’s technology.

Autonomous crowdsourced bathymetry (CSB) is one of the newest tools in the hydrographer’s toolbox, leveraging the application of 21st century technology and social media, both now an integral part of our everyday lives. While high-end surveying equipment is still unmatched in precision and accuracy in the hands of a professional hydrographer, very capable surveying technology is now low cost, readily available and already distributed
worldwide in the form of standard-equipment vessel electronic charting systems, or chartplotters. Combined with the wireless and cellular networks that we are all constantly connected to, we have the ready means to aggregate and share this distributed coastal intelligence; and with the application of scientific principles rooted in hydrography and big data, we also have the ready means to compute solutions (along with uncertainty estimates) of this data to meet a variety of needs. And thus, the science of autonomous CSB is emerging as a next-generation tool that mirrors the connected mindset of the next generation of hydrographers.

One such purpose for which autonomous CSB is being successfully implemented is as a reconnaissance tool for boaters on the Intracoastal Waterway (ICW) (see Figure 1). Some sections of the waterway consist of natural inlets, saltwater rivers, bays and sounds, while others are artificial canals. It provides a navigable route along its length without many of the hazards of travel on the open sea. The regional maritime community is taking advantage of CSB as a self-enabling technology through a creative collaboration with industry. Leveraging the public’s availability of modern technology and their natural desire to be well informed as well as to benefit society, mariners are providing data that bestow unprecedented insight into conditions and resources along the ICW.

The Salty Southeast Cruisers’ Net (SSECN) is an online social media forum focused on the Atlantic ICW, and a treasure trove of useful reports and articles provided and consumed by the ICW community. The SSECN website informs others via familiar chart displays provided by EarthNC, enhanced with access to information such as fuel prices, marina accommodations and navigation hazards like misplaced buoys and shoaling. These reports are also enhanced by the millions of water depth measurements made by cruisers during their routine ICW transits, autonomously delivered and processed through the ARGUSâ„¢ CSB innovations of SURVICE Engineering and CARIS USA. This virtual, distributed surveying ‘˜vessel’ acts as a member of the SSECN cruising community, greatly enhancing condition reports provided through the SSECN website with a continuous flow of physical measurements as portrayed in Figure 2. This model provides the ultimate opportunity to engage the public as it both leverages and supports the public’s recreational and commercial interests in the ICW. What was previously a fleeting number on a chartplotter screen has become useful knowledge thanks to this pioneering partnership.

ARGUS Crowdsourced Bathymetry
Autonomous crowdsourcing for maritime applications has been pioneered by SURVICE Engineering and CARIS USA through the innovations of ARGUS. ARGUS is a patented (US Patent 8,417,451) autonomous CSB system that provides continuous, automated acquisition and processing of CSB data. It universally interfaces with vessels’ existing GPS and depth-finding systems, automatically processes the GPS and depth signals, and leverages wireless technology and social media for both data aggregation and web dissemination of process outputs. Originally demonstrated as part of a National Oceanic and Atmospheric Administration (NOAA) Small Business innovation Research (SBIR) grant, ARGUS has processed over 100 million depth soundings from a distributed, international fleet of opportune vessels ranging from 18-foot recreational bass boats to 1,000-foot commercial cruise liners (see Figure 3).
In the image, vessel traffic is clearly highest in the same coastal zones in which up-to-date reconnaissance is most needed. Studies suggest that ARGUS solutions can meet IHO S-44 Order 2 Standards. ARGUS has demonstrated a powerful and practical approach that inexpensively leverages an unlimited, distributed workforce. Fundamentally, ARGUS processes every GPS position and corresponding water depth measurement that is output from the chartplotter. The system operates autonomously with no operator interaction required other than turning on the chartplotter. Backend processing includes the application of vessel offsets, tide and other environmental corrections, various stages of quality control, and CSB-specific data aggregation methods. Output from the process can be managed through CARIS’ Bathy DataBASE (BDB), which is used to compile survey data with appropriate metadata that can be used for searching. CARIS’ Spatial Fusion Enterprise (SFE) then can be used to serve out the data via the web. CARIS BDB and SFE provide powerful post-processing and visualisation platforms for the web-served ARGUS solution sets, robust and scalable storage and analysis for the ever-expanding volumes of data, high-resolution graphics, industry standard bathymetric processing modules, and simple yet powerful end-user interfaces.

CSB Application on the ICW
ARGUS has been in operation since 2010, acquiring over 100 million soundings from a distributed fleet of vessels navigating US and international waters. Over 20 million of those soundings have been processed over the 1,000+ miles from Norfolk to Key West, thanks to long-time contributors like Sea Tow, M/V Altair, M/V Chez Nous, Trawler Beach House, and Reality Check Sailing, and the data solution
set is continually being refreshed. Figures 4 and 5 show two of the classic ICW trouble spots highlighted for SSECN readers: Georgia’s Jekyll Creek and Little Mud River, respectively.
These are typical examples of ARGUS data providing a real ‘˜visual’ of the conditions and of the best route of travel through these trouble spots.
Clearly evident in the case of the ICW, an especially hard-to-reach area for official survey assets, the swath of CSB data provides the partnership with a great opportunity to update the magenta line, or preferred route of travel, as currently represented on official charts. The magenta line was last comprehensively surveyed in the 1930s and desperately needs updating. Figure 6 shows one of many examples where the swath alone indicates the preferred route of travel, yet without consideration for which is the deepest part of the swath. Endorsed by the
Atlantic Intracoastal Waterway Association, this project will add a continuously updated magenta line as a layer in the SSECN chart windows. Since the CARIS-led introduction of autonomous CSB to the international hydrographic community in 2010, CSB’s potential value has been noticed and is rapidly moving to leverage its benefits. Among others, the development of CSB has since been endorsed and encouraged by the United Kingdom Hydrographic Office, the International Hydrographic Organization and the Hydrographic Services Review Panel in the United States. The application of inevitable hardware improvements along with scientific expertise promise to only make CSB solutions better ‘” in fact magnitudes better than the pre-1940s ‘˜soundings’ that are the basis for the majority of modern charts.

Who Benefits?
Crowdsourcing provides an opportunity to apply innovative technologies while engaging partners from academia, the public and commercial entities. It also attracts populations that are currently underrepresented in the hydrographic science workforce. The continuous fl ow of coastal environmental information promotes stewardship and informs decision making by stakeholders, educators, students, and the public who are interested in science. Crowdsourcing is an effective engagement of key stakeholders and the public that can enhance literacy of our coastal environments.

Through this pilot application, SSECN readers are getting the benefit of a reconnaissance tool that keeps them best informed about the journey that lies ahead. The chart windows and layers allow planning for tomorrow’s journey while in a slip or on the anchor with a look-ahead view of current attractions, alerts and trouble spots. Information is bolstered by local knowledge of the SSECN community as the readers monitor local solution updates, make local chart comparisons and identify areas of interest (e.g., shoaling), which are then reaffirmed by and for the community. Reader testimonials indicate wide approval of these SSECN reports. The general public benefits from a reduced need to tax current observing systems, which are already 100 years behind schedule and with growing requirements. Steadily decreasing resources have reduced the number of hydrographic survey platforms worldwide to about 65% of what it was 15 years ago. This is in the face of commercial maritime trade that has increased three-fold since the 1970s. Especially in hard-to-reach areas such as the ICW, crowdsourcing can be used as a supplement to mission planning for official surveys requiring controlled measurements as shown in Figure 7.
Resource-challenged hydrographic offices realize that they must rely not only on their own capabilities, but that they must also engage stakeholders and the public at multiple levels in order to build capacity and accomplish their missions. As demonstrated in other application areas such as the Chesapeake Bay, Antarctica, coastal New York and New Jersey, and the ports of Baltimore, New York, and Pittsburgh, one can see additional CSB networks being established to support local interests while complementing the work of hydrographic services and surveyors. Combined with the availability of the internet and wireless connectivity, remote sensing far beyond the capacity of all the world’s hydrographers combined is being realized. With the challenge of reduced resources, the use of CSB and other nontraditional methods for collecting data will grow to support the ever-increasing needs and uses for hydrographic data. The newest members of the hydrographic workforce’”the commercial and recreational vessel captains that value the waterways’”are bringing the fruit of their efforts to the benefit of the entire ICW community.

Further Reading
Van Norden, M., P. Cooper, and J. Hersey. Crowdsourced Bathymetry: One Solution for Addressing
Nautical Chart Data Deficiencies. US Hydro 2013.
Sedaghat, L., J. Hersey, and M. McGuire. Detecting Spatio-Temporal Outliers in Crowdsourced
Bathymetry Data. GEOCrowd 2013.
SURVICE Engineering ARGUS Website, http://argus.survice.com/.
The Salty Southeast Cruisers’ Net (SSECN) Website, /.
The Atlantic Intracoastal Waterway Association (AIWA) website, http://www.atlanticintracoastal.org/.
John A. Hersey
John Hersey is the Research and Technology
Team leader for SURVICE’s Applied Technology
Operation, focused on the development of
innovative solutions to meet the requirements of federal
and commercial customers. He is the lead engineer and
project manager for ARGUS, coordinating all of the
contributing vessels and processing methodologies
employed in the various application areas, such as the ICW.
john.hersey@survice.com
Paul R. Cooper
Paul Cooper is the vice president of CARIS USA
and the current president of the Hydrographic
Society of America. He is also vice president of
the US National Section of the Pan American Institute of
Geography and History and a board member of the
Mid-Atlantic Regional Association Coastal Ocean Observing
System (MARACOOS).
paul.cooper@caris.us

This notice of an update of ARGUS by John Hersey is definitely GOOD NEWS for Waterway cruisers. If you are not now a user of ARGUS, give it a try by clicking the ARGUS box at the top of any of our Chartview windows – it is an amazing technology! Keep your fingers crossed that NOAA will wake up and begin to use ARGUS in place of the infamous magenta line. The proposal to use ARGUS as the magenta line has been endorsed by the Atlantic Intracoastal Waterway Association.

John Hersey is the Research and Technology Team leader for SURVICE’s Applied Technology Operation, focused on the development of innovative solutions to meet the requirements of federal and commercial customers. He is the lead engineer and project manager for ARGUS, coordinating all of the contributing vessels and processing methodologies employed in the various application areas, such as the ICW.

Hi Larry,
Just a note to let you know we just updated the AICW solution set this morning, thanks to about 7 million new soundings since March from a bunch of boats including long time contributors M/V Altair, M/V Chez Nous, Trawler Beach House, Reality Check Sailing, M/V Jackets II, S/V Makai, and M/V Elixir. The update reflects several additional transits between Norfolk and the Keys, new Bahamas cruise ship data, St. John’s River updates from Jacksonville to Sanford, and previously uncharted waters on the west coast of Florida thanks to the adventurous expeditions of Trawler Beach House! The total AICW soundings count that makes up the SSECN ARGUS layer is now up to about 30 million.
Also FYI, our magenta line proposal is back in NOAA’s hands. We appreciate your continued encouragement and support as we move forward in applying ARGUS data to help update the magenta line!
Just let me know if you have any questions.
Thanks,
John

Twice in recent weeks, two of our faithful readers have reported unsafe navigation conditions PRIOR to USCG Marine Safety Broadcasts or Local Notices to Mariners. See /?p=145996 and /?p=145983 as reported by David Burnham and Sue Ward, respectively.
The selfless actions of these two skippers clearly defines the purpose of Salty Southeast Cruisers’ Net: “Cruisers Helping Cruisers!” Taking the time to write to us and to follow up on the unsafe conditions may not be the heroics of an emergency rescue, but one cannot underestimate the value of giving our fellow boaters that peace of mind when entering a new port or anchorage that comes from “local knowledge.” These skippers have demonstrated the very best of navigation traditions to come to the aid of their fellow boaters.
So, David and Sue, on behalf of all cruisers, we thank you for your efforts and for being ideal role models! We salute you as “Our Heroes!”

Larry

This discussion is from our friends on the AGLCA Forum. While we certainly appreciate Captain Ed’s recommendation of SSECN’s list of AICW Problem Stretches, we strongly recommend that a reader choose the listings of Problem Stretches under the various States found on our Homepage. These listings have the very latest comments and updates on the Problem Stretches within the particular state. For example, see /category/nc-aicw-problems/ for North Carolina. And whether you go inside or outside, we wish you the best!

By: CaptainEd on December 7th, 2014, 7:48 am
I think you’ll find this link to Salty Southeast Cruisers net helpful to give you the current places to be showing extra caution: /category/all-other-news/icw-problem-areas/. Keep in mind though that many of the caution areas are noted by cruisers who were just in the wrong place and would rather blame the charts than themselves. The tide isn’t too much of a factor if your boat draws less that 4′. It generally only ranges 0′ to 3′ down there. There are a few notable caution spots like Lockwood’s Foley, Shallotte Inlet, Carolina Beach and Mud Creek, but it’s not a difficult run. If you do decide to run outside familiarize yourself with Dial-A-Buoy for accurate reports of sea conditions. You don’t want to get caught 25nm off shore or having to come in through unfamiliar inlets if seas are running 8′ or more.
If you’re running a slow boat (less than about 16 kt. cruise) I’d recommend staying inside unless in a sailboat most of the way to Charleston as the main inlets are a good distance apart (Beaufort, Masonboro, Cape Fear, Georgetown, Charleston), and some of the lesser inlets are to be avoided. Also, the time you spend running in and out of the inlets will cost you much of the time you save by being able to run faster outside. Just remember to mind your wake in populated areas or you’ll hear about it over your radio.
Mind if I ask why you’re heading south instead of north at that time of year? You’ll find very few boats heading that way as most insurance companies prohibit going south during hurricane season. Also, it’s hot, and there are a lot of horse flies near Georgetown and through Georgia. It’ll also have you pushing against the current as you head north from the Gulf, and probably have you laying up down south for next winter.