It has 10 analogue channels: in the standard configuration, five are used for accelerometers. Tese have a range of ± 20g. Its sampling rate will be 600Hz. The set-up includes one 3-axis
accelerometer monitoring hull impacts in x, y and z, and two 1-axis accelerometers which will be attached to kidney belts and worn by the coxswain and the navigator at all times. It also has a built-in GPS receiver, logging satellite time, position, heading and speed. Te 16GB internal USB memory can store the data for the entire period of the study. Aſterwards, or even during the study, data can be uploaded to a PC for analysis. Figure 5 shows the Marec data logger,
connected with (counter-clockwise) two human accelerometers, the hull accelerometer, the GPS antenna and the red/black power cord. The kidney belt with sensor is attached as close as possible to the upper edge of the pelvis on the axillar line (side line).
Pain indicates risk of injury To assess the risk of injury before it occurs, various physiological parameters can be used. Lab testing of raised levels of creatinine is one. Repeated testing of blood samples is not possible in a large population. Instead, pain is used as an indicator of threatening injury. Occurrence and development of pain will be monitored on all personnel serving on board the boats during the entire trial period. Tis will be done using PainDrawing, a smartphone app, daily prompting subjects to report any relevant pain. Pain is a physiological function
provided to protect us from injury by telling us what is potentially harmful. Pain is the only physiological parameter that can be used as an indicator of risk of injury and be monitored and quantified over time, frequently enough to monitor a sufficiently large population of test subjects. Pain is considered relevant to use as an
indicator as its primary function is to prevent injury. There can be temporary pain without injury, but very rarely a manifest injury without pain. Pain is also in itself a relevant symptom, or
sometimes a condition, which compromises physical performance and endurance and eventually even mental capacity. Figure 6 shows the PainDrawing
app, which is optimised for maximum subject compliance with a self-instructing interface. It prompts subjects for input on pre-set times. Answering takes approximately four to 14 seconds, depending on whether or not there is any pain to report. It should be obvious that exposure
causing pain during demanding operations must be avoided, or limited as much as possible – not only for liability reasons or for the long-term health aspect, but for enhancing proficiency and effectiveness of the teams operating in adverse environments and challenging conditions.
Swedish safety at sea since 1888
Your safety, our constant concern is the driving force behind IKAROS wide range of life saving products.
Ikaros stands for safety at sea. Our products are proven by years and years of use in the toughest conditions. When at sea, there are no room for mistakes. Ikaros offers all the sea safety products you need. But more importantly – we make sure they will work. Our products are globally approved and meet the demanding SOLAS* requirements.
*International Convention for the Safety of Life at Sea
www.ikarossignals.com
Ship & Boat International November/December 2018
49
Feature 4
Visit us at
METS TRADE, Amsterdam in the Swedish Pavilion
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