Rugged connectivity: Lessons I’ve learned from high-end racing

Top Competitors Take Big Data and the Internet of (Boating) Things To the High Seas in Their Quest for the America’s Cup.

Published on the Occasion of the 36^th America’s Cup World Series (ACWS) Race in Auckland, New Zealand, December 17-19, 2020

By Stuart Doe, Head of Active Solutions, Fischer Connectors

High-end racing, whether on land or water, is notorious for its secrecy. With the Prada Cup and America’s Cup races in 2021, no one working with any of the hyper-competitive teams would dare give away those secrets.

Spoiler alert: This isn’t about secrets. Even though Fischer Connectors is the exclusive connectivity sponsor of American Magic – a challenger for the 36^th America’s Cup – and has provided connectors and solutions for many racing yachts over the past five decades, we can’t give away any of our trusted partners’ competitive secrets. This article is about the lessons learned working on various racing yachts over time, and how some of the latest connector technology and strategies used in racing can be applied to other real-world applications.

Racing into 2021

From the moment the America’s Cup AC75 class rule was first published on March 29, 2018 by the current America’s Cup Defender, Emirates Team New Zealand, challenger teams have been designing and engineering their boats within the set rules to give them every possible edge in a temperamental racing environment. In fact, American Magic spent over 76,000 man hours producing its first AC75, DEFIANT.

So, what are the stats for an AC75?

• Length: 22.76 m
• Width: 5 m
• Weight 6.4 tons
• Crew: 11
• Crew weight: 990 kilos
• Construction: carbon fiber and double-skinned soft mainsails
• Construction hours: 76,000+
• Design hours: 90,000+
• CNC machine and/or 3D printing hours: 45,000
• Individual parts: 25,000
• Sensors: 400+

Lesson One: Sensors Create Real-Time Data for Immediate Decision Making

Sailors and their support teams operating in high-pressure situations have to deal with many more variables than, say, the driver of a “simple” NASCAR vehicle. Wind speed and direction, water movement, water temperature, hull angle and foil position are all variables in yacht racing that can not only affect each vessel differently, but also change constantly during the race. Sensors are everywhere on the boat, from the foils to the wingsail, gathering data that enable sailors to calculate and use them to their advantage. Additionally, sensors help to adjust strategies or tactics in a fraction of a second if they get the right information at the opportune moment.

Given the strict weight criteria for such a “flying machine”, designers and engineers are constantly deliberating over each component used on the vessel: Will it deliver during practice, during the race, once or over time? Is it rugged enough? Is it too heavy? Is it really needed?

The Importance of Interconnect Solutions

Reliability in both the sensors and connector solutions is essential. Maintainability is critical, as is IP (Ingress Protection) sealing and the ability to withstand saltwater ingress and spray.

Elevated temperatures are also a challenge to connector solutions, as most electronics are stored (and operated) in sealed airless compartments and may be exposed to extreme solar heating. Indeed, a black carbon panel can easily reach above 70°C in the UK sunshine – let alone in New Zealand! This places significant duress on the reliability and functionality of the electronics enclosed within.

Fiber Optic Plays an Important Role

One area of great interest beyond the use of conventional copper wired interconnect solutions is the use of fiber optics for data transmission. In the America’s Cup in 2017, fiber optic sensors were embedded in the race boat foils and in other key components. This allowed the team to measure, analyze, predict and optimize the design of the parts, while keeping stress levels under control. If set correctly, the foil offers both lift and drag, similar to an aircraft wing in flight.

Fiber optic devices tend to be smaller and lighter than conventional copper. The cable is essentially a glass tube less than 2 mm in diameter. It comprises layers protecting the fiber glass that propagates data using light energy, which is converted into an electrical signal at the destination source. In essence, data speeds move in near perfect conditions within the fiber, resulting in the highest data transfer rates, without loss or low delay.

Another advantage of fiber optics is the ability to physically embed these miniature single-strand sensors into the laminated carbon structures of the boat, without affecting the structural integrity of the foil or mast/wing section or the functionality of the hardware. These embedded sensors also ensure you can monitor potential breakages of such highly stressed parts of the boat at all times and avoid them if at all possible. Clearly, these items are very asset-sensitive due to cost, material and build time; hence only the most appropriate cabling and connector systems can help ensure longevity and avoid delays in this challenging environment.

A final significant benefit for the AC75 is the weight advantage offered by this type of fiber optic. When considering electronics control systems on board boats, it’s fair to assume most yachts carry in excess of 60 kg of wire for their control and instrumentation circuits. This weight can be greatly reduced if traditional copper is replaced with state-of-the-art, high-capability fiber.

Data as a Commodity

As reported by Martin Whitmarsh, CEO of Land Rover BAR, with all this live real-time data from in excess of 400 sensors per boat*, it’s a veritable treasure trove of data. It’s essential that adequate data connection, onward transmission, storage and subsequent analysis be performed for all modes of sailing and conditions. As a dinghy sailor myself, I consider my surroundings and speed while sailing, just two variables that affect my performance. For these high-performance racing yachts, however, sailors consider up to an estimated 300 variables simultaneously to evaluate and adjust performance, including water time, flight time, speed, boat position, angle, loads, foils and rudder angle. To do this perfectly in a race requires gathering, transmitting, analyzing and acting on reliable data. In 2017, it was estimated that Team Oracle’s boat accumulated between 200 GB and 500 GB of data every day. It’s no wonder that so much data crunching is needed to ensure you can optimize the performance of every element for live sailing conditions. This explains the involvement of companies like database giants Oracle and Dell EMC in the last America’s Cup and, more recently, Hewlett Packard for this 2021 campaign. Clearly, reliable data management ensures the boat performs as competitively as possible and defines a clear configuration setup for each and every condition that the boat is raced in. Recent reports from the teams out in New Zealand suggest that the typical data now being collected by this year’s Cup teams are in excess of 1 billion data entry points. This makes the data collation and sifting activity a significant contribution to the teams’ performance and understanding of the data variables, with significant implications for performance.

These load meters are also supported by numerous water-based sensors calculating GPS, depth, turbulence and temperature and, most importantly, speed. This was shown on the SAIL GP event in 2019, when two methods of boat speed were needed to validate the over 50 Knots (57.5 mph!) achieved by both the Australian and UK teams during this race series.

Ease of accessibility and interconnectivity between these sensors and any instrumentation are critical and, of course, the performance of any marine-based connector must be resistant to water ingress (IP rated) and harsh saltwater corrosion. As previously mentioned, weight is also a critical performance criterion for any foiling craft, so the provision and support of this technology is often a balance against weight, performance, functionality and cost.

The use of real-time data from these sensors is pivotal to both design measurement simulation and actual optimal performance, thereby allowing both prediction and practice of the fastest method of sailing in pursuit of the Cup. This is also true of weather measurement, and wind and wave prediction. If one side of the course is favorable for optimal performance, it’s key to identify tactically how and where patterns of wind will be emerging. This is especially the case in New Zealand, with its interesting harbor course and sheltered racing areas.

It isn’t just the racing yachts that are outfitted with a myriad of sensors. Chase boats and support vessels are deployed prior to the event to survey, mark out and ensure sailing areas are clear of underwater obstructions. All these vessels use 3D sonar scans and data overlaid on conventional chart plotters, which are updated live via 4G networks. Teams are increasingly utilizing the higher bandwidth and live-streaming capabilities of 5G that became available with significant infrastructure updates during the end of last year.

Broadcast-Quality Communications on Every Boat

Transmitting information to the base team for their use is a given, but racing organizations also make technical information available worldwide, broadcasting on multiple platforms and applications, even to devices carried in a spectator’s hand.

The sailing world first saw the production of stadium-style racing introduced in the late 1990s. These boats, like those competing for the 2021 America’s Cup, were live-streaming on-board video and telemetry data, along with audio, directly to audiences. With ever more information and data from the boats now being displayed live to audiences through traditional broadcasts, interactive apps and across the Web, etc., the races come even closer to those on spectator boats or on shore. All cases require robust and secure connectivity boat-to-boat and boat-to-shore to facilitate this.

Lesson Three: Innovation and the Connected Team

With enormous budgets on these boats, even for high-end racing, it’s clear that every team is pushing the frontiers of technology, science, innovation and performance of the boat and the crew. That’s only what we know about now, not what’s being kept secret!

In years gone by, the crew was there to provide power to drive the winches for sail movement and trim. While this is still the case to some degree, there’s also a small amount of battery support topped up by the crew grinders.

Crew role, weight and performance output have now become critical. This means, in addition to data gathered from the boat itself, there’s now far more interest in the biographical data from the crew itself, along with individual communication and data sharing on board the boats. Years ago, wind noise was not an issue for the sailors, who now travel at speeds in excess of 60 mph. Specialist headsets and microphones had to be generated to allow interconnected radios among the team members. Buoyancy aids now hold radios, batteries and multiple interconnects between buoyancy aid and headsets.

Remove unnecessary weight while increasing data transmission with fiber optic solutions. If IoT strategies and technology are available to racing yachts, then they can be available to any application, anywhere.

Ultimately, engineers looking for a solution may be seen to be competing, whether it’s against their actual competition, or simply because the application being designed is a challenging puzzle that needs to be solved with the best, most efficient design. My advice as a sailor: When you need to stay competitive, strive for excellence and aim to be the first across the finish line. However that finish line is defined, always remember the fun of the race.

*Martin Whitmarsh, CEO of Land Rover BAR, 2017, www.silicon.co.uk/networks/bar-americas-cup-2-210191