Nonmedical Backcountry Equipment for Wilderness Professionals

Chapter 94 Nonmedical Backcountry Equipment for Wilderness Professionals




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Whether for work, research, or recreation, specialized outdoor equipment enhances safety, ensures survival, and provides comfort, sustenance, and shelter. When chosen carefully and cared for properly, outdoor equipment may last a long time. This chapter examines basic concepts for choosing outdoor gear.



General Concepts for Choosing Equipment


Factors to consider when choosing outdoor equipment include the following:







An outing in a remote locale or of a long duration may require different gear than would a short outing close to an urban environment. In the wilderness setting, the equipment one uses is not just for personal adornment or comfort—it may be a lifesaving tool (Figure 94-1, online).




Choosing Gear


When shopping for outdoor equipment, one notices a huge variety in cost, materials, and quality. Although the general rule is that the more expensive gear is of better quality, this does not mean one must always purchase “the best.” Certain sports require sport-specific gear, but many general pieces overlap and can be used for a multitude of situations. Examples include camping gear (e.g., tent, stove, and sleeping bag) needed for most overnight adventures. However, one might require a different tent when car camping with the family than if undertaking a backpacking trip to a remote location. When car camping, a large two-burner gas stove is appropriate and useful, but it would be burdensome to carry in a backpack because of weight and bulk. For a sleeping bag, even at the same temperature rating, a heavier, bulkier, and less expensive bag would be adequate for the car camper, whereas the backpacker would require a lighter, less bulky option, which would be more expensive because of materials. One should purchase gear appropriate for the level of the adventure. It may be best to carry certain items, such as stoves, in duplicate for various applications.


With the advent of new technologies, outdoor equipment has become significantly lighter and often quite expensive. An ongoing debate among outdoor enthusiasts centers on the concept of weight. There are two basic theories for selecting equipment and packing for wilderness travel. One concept is to carry as much of the best equipment as one can reasonably haul and afford. This theoretically enables one to prepare for as many outdoor conditions and mishaps as possible and allows for maximum variability and flexibility. This works well for long trips with support vehicles, boats, or porters, especially research or scientific expeditions. However, this style is not practical if terrain, weight, space, or funds limit equipment choices.


The more common concept endorsed by recreational travelers is using light, compact equipment. An alpine mountaineering style perfected by long-distance hikers has been developed around this concept. Carrying less and using lighter equipment saves energy and often leads to a safer, more enjoyable experience. It makes sense to skimp on weight when maximal performance is not necessary. For most recreational outdoor enthusiasts, maximal performance is rarely necessary. For example, instep crampons may be adequate in place of full-frame crampons for low-angle, nontechnical snowfield hiking. Even when full-frame crampons are used, they are rarely used at the limit of the integrity of the structure or the strength of the materials.


Some newer, lighter, and “high-tech” tools use cutting-edge materials. Carbon fiber, titanium, magnesium, aluminum, plastics, and other materials create strong, light equipment. If weight, durability, and maximal performance are issues, consider using tools made of these materials. If one does not need extremely lightweight equipment, then traditional materials may work just fine. For example, a standard aluminum avalanche probe is more durable and only slightly heavier than is a new carbon fiber probe. Using light gear potentially introduces some risk. The gear can be less durable, less reliable, and more expensive. A plastic avalanche shovel is not nearly as durable as is a heavier aluminum one. Multifunction gear is a great way to shed weight and space. However, performance of each function may be compromised. For example, multitool pliers do not have the strength or power of simple tongue-and-groove pliers. Also, if the tool breaks or is lost, one has lost more than just a single item. For example, most experts agree that in a rescue, an avalanche probe is superior to ski poles that convert to a probe (Figure 94-2).



Practice is key to using equipment properly, especially with equipment that is highly technical, complicated, or electronic. Choose simple tools and gear, because they are often more reliable and durable. Try to get gear that is easy to adjust and repair in the field. Avoid complex gear that requires special tools for setup, repair, or maintenance. For example, choose “tool-free” crampons that adjust without a wrench or screwdriver; use a compass with an easily adjustable declination correction. Everyone does not need to carry the same gear. Members of a party should divide equipment and carry different tools to avoid unnecessary redundancy. This way, the team has a greater selection to match tasks and can split up the weight and bulk of items like stoves, tents, medical gear, and research equipment. Plan well, but learn to improvise. One should never cut corners on an emergency kit or survival gear.



Essential Emergency Equipment


When planning any sort of wilderness activity for work, research, or recreation, travelers should prepare a basic emergency kit. In 1906, a group known as The Mountaineers was organized that specialized in outdoor adventures and climbing. A series of climbing courses and collaboration ultimately produced Mountaineering: The Freedom of the Hills in 1960, now in its seventh revision. Through this work, a list of 10 Essentials was devised, which was the gold standard for emergency preparedness in the outdoors.



The advent of new technologies has necessitated revision of the original list; however, the fundamental concept of preparation remains unchanged.



Regardless of technology, most experts now recommend a basic list of essential equipment that may include more or less than 10 items and varies according to context. A basic emergency kit should include first-aid, survival, and repair materials. The questions to ask when determining the size and contents of an emergency kit are who, what, where, when, how far, and how long?






How Far? How Long?


Longer trips to remote destinations mandate more advanced equipment for safety and survival. Commercially available emergency kits usually include first-aid, survival, and repair supplies. Alternatively, a wilderness enthusiast can prepare his or her own custom kit. Three basic sizes for emergency kits are generally in use.


A basic emergency kit may be used for day outings (see Box 94-1 for an example of a basic compact kit). This includes enough equipment to cover one unexpected night out in mild weather. A small kit provides only the bare minimum of survival gear for food, shelter, water procurement, navigation, fire building, first aid, and equipment repair. Everyone should carry a personal emergency kit, even if there is a large group emergency kit.




BOX 94-1 Basic Emergency Kit


A basic emergency kit should include first-aid, survival, and repair materials.





Navigation


The bare minimum is a compass with declination correction and a topographic map. An altimeter is useful, especially in the mountains or canyons. One may choose to carry a GPS unit but should always have a compass for backup (see Chapter 96). Surveyor’s tape can be used to mark dense woods. Wands (1-m [3-foot] bamboo poles with surveyor’s tape on the top) are useful for marking crevasses and snow routes.










Information about retail emergency kits is found at http://www.orgear.com or www.omnikit.com. Complete medical supplies are listed in Chapter 91. Equipment for vehicles is listed in Box 94-2.




Navigation


There is no substitute for a map and compass. The bare minimum navigation system is a compass with declination correction and a topographic map. Global Positioning System (GPS) technology offers many admirable features; however, it depends on an energy source and electronics. If one is fully dependent on a device that fails, then disaster is imminent. Electronics are neither indestructible nor waterproof. A common failure of GPS navigation is when a sufficient number of satellites cannot be acquired in dense foliage or obstructing terrain, such as a slot canyon. In addition, batteries often do not perform adequately in temperature extremes. One should always carry a compass and appropriate map for backup.


Many techniques exist for use of map and compass. Information is available in Chapter 96. Overall, the concept of navigation is to know current location and direction of intended travel. An altimeter is useful, especially in the mountains or canyons. Wrist altimeters are either GPS based or interpreted via changes in barometric pressure. GPS devices are more accurate. A sudden change in barometric pressure can indicate an impending storm and allow persons additional time to find shelter. Many wristwatches now feature storm alarms.


GPS devices allow easy and accurate positioning via triangulation with satellites (Figure 94-3). The greatest utility of GPS is when used in concert with a topographic map and compass. GPS devices provide information such as velocity, bearing, and distance or deviation to next waypoint. They are available in handheld and wrist-top configurations. Handheld units have a larger screen but are more bulky than the wrist-top devices. Some display topographic maps, although at varying resolutions. Wrist-top GPS devices are newer technology and are more expensive. Additional features, such as heart rate monitor, serve to combine a traditional training wristwatch with a GPS device. The information is compatible with Google Earth and similar programs, so that the user may upload the information to a personal computer to track route/performance (Figure 94-3, B). Wrist-top GPS units are commonly synchronized to a computer, where preplanned checkpoints are established.




Sun Protection


Carry sunscreen and sun-protective eyewear, either goggles or glasses. A sun hat and sun protective clothing are also important. See Chapters 14 and 93 for more information about sun protection.



Sunglasses and Goggles


Sunglasses and goggles provide visual comfort and clarity while protecting one’s vision from the elements, debris, and damaging ultraviolet (UV) radiation. Glasses should fit close to the face and extend to the temples to protect against stray light. Broad temple arms or leather blinders can also be employed to protect against stray light, which is important in mountain climbing or glacier travel due to higher levels of UV light.


Polarized and mirror lenses reduce glare and improve vision because of less squinting and eye fatigue. The lens color, although mostly a personal preference, provides a functional benefit. Less color distortion is seen with red, grey, green, and brown lenses. Brown, orange, and yellow serve to increase contrast. Orange and yellow increase depth perception but also increase color distortion. No one lens is ideal for any given environment, so interchangeable lenses provide an advantage. An important consideration despite lens color is the percentage of light transmitted. Most sunglasses fall within a range of 10% to 30%. Dark lenses that allow a low percentage of light transmission can result in loss of vision when moving from a bright environment to one that is dark, such as when driving into a tunnel or shaded turn. Lenses with less than 10% transmission are needed in the extreme lighting conditions of glacier travel, hence the advent of glacier glasses. In addition to low light transmission, glacier glasses should completely shield the eyes from all stray light.


Lenses are constructed of glass or plastic. Glass and plastic are nearly transparent to the visible spectrum while opaque to the UV spectrum. Glass lenses maintain superior clarity and scratch resistance; however, plastic lenses are preferred in contact sports and outdoor activities due to impact resistance. Several varieties of plastic lenses are available, such as acrylic, polyurethane, CR-39, and polycarbonate. Polycarbonate is used in aircraft windshields They are the lightest while offering the greatest impact resistance (50 times greater than that of glass lenses).


The UV spectrum is divided into UVA (320 to 400 nm), UVB (280 to 320 nm), and UVC. UVC is entirely blocked by the atmosphere, thus is not of concern. UVA and UVB are damaging and result in significant morbidity. Although ultraviolet light is well known to cause sunburn and skin aging, it also contributes to skin cancer and a number of ocular disorders, such as cataract, pterygium, solar keratitis (snowblindness), and macular degeneration. It is essential for eye protection to absorb 99% to 100% of the UV spectrum to 400 nm. Manufacturers are not consistent in reporting percentage of UV absorption up to 400 nm and may not include the entire UV spectrum. Glasses that meet this requirement are often labeled “UV 400.” The U.S. standard is established by the American National Standards Institute (ANSI), which includes three transmittance categories. According to the ANSI Z80.3-2101 standard, the lens should have UVB transmittance of no more than 1% and UVA transmittance of no more than 0.3 times the visual light transmittance.


Several ballistic standards are adhered to for military applications, such as ballistic International Standards Organization testing, ANSI test standards, and the MIL-STD 622 ballistic test. Similar to the percentage of UV transmittance, the ballistic standard used in the United States is from ANSI. This standard outlines requirements for basic-impact and high-impact protection. In the basic-impact test, a 2.5-cm (1-inch) steel ball is dropped on the lens from a height of 127 cm (50 inches). In the high-velocity test, a 0.6-cm (0.25-inch) steel ball is shot at the lens at 150 ft/sec. To pass both tests, no part of the lens may touch the eye. In the MIL-STD 622 ballistic test, the lens must stop a 0.22-caliber bullet fired from 6.1 m (20 feet). At the time of this writing, Oakley, Revision, Wiley X, Uvex, ESS, Pyramex, and Gargoyles manufacture sunglasses in compliance with the above standard.


Additional considerations apply to certain circumstances. Buoyancy should be considered with any water sports activity. Ventilation and antifog coating in cold environments are important considerations, because perspiration can steam up lenses. For the vision impaired, corrective lenses are available or a prescription lens can be inserted. Persons participating in contact sports or other activities requiring agility should consider impact-resistant lenses and a strap to secure the frame in place.


The lenses of goggles have the same considerations as do sunglasses with respect to the UV coverage, lens color, clarity, and durability. Interchangeable lenses are a cheaper alternative to buying several sets of goggles. The fit should conform to the face using hypoallergenic foam without pressure points. Many manufacturers apply a proprietary antifogging coating and incorporate adjustable ventilation. Regardless of the coating, a double-layered lens works well. A few goggles incorporate small electric fans to evacuate moisture. One should also consider helmet compatibility.



Lights



Headlamps


Headlamps provide many advantages over conventional flashlights by permitting hands-free use. Technology has advanced considerably to produce compact and lightweight units with long battery life. Historically, incandescent bulbs, such as xenon and halogen lamps, provided brighter and more natural light than did light-emitting diodes (LEDs). However, high-output LEDs now have light output comparable with incandescent bulbs. LEDs tend to be more rugged and demonstrate superior battery life.


The bulb has three key properties: brightness (distance), duration (time of usable light), and shape of beam. These depend on type of bulb, shape of housing, and battery type and size. Incandescent bulbs are less expensive and consume moderate amounts of battery power. Halogen and xenon bulbs emit whiter and brighter light but usually consume power at much higher rates. LEDs are small, have a smooth light, and use batteries efficiently. Because they are not nearly as bright as are other bulbs, headlamps using LEDs usually have three or more diodes in operation simultaneously.


With two equal AA batteries, most headlamp bulbs perform as follows:





Some headlamps have two types of bulbs: a bright xenon or halogen for important tasks that require bright light and three or more LEDs for functioning around camp or reading. These lamps are an excellent choice for professionals. The bright light can be used for night search and rescue or identifying animals. The LED can be used for documenting research or repairing gear.


Features to consider include light distribution, durability, water resistance, and maintenance. The headlamp should be compatible with a helmet if that is a requirement. A good headlamp has a spare bulb stored within it, is weather resistant, and has smooth light distribution with an adjustable beam. A good field of illumination provides even lighting in front of the user and well into the field of peripheral vision. Shape of the beam depends on housing. Some have a narrow beam with a longer range, sometimes up to 20 or 30 m (65.6 or 98.4 feet); these headlamps are good for night searches or route finding. Headlamps with a wide but short beam concentrate light for near work, such as within a tent or vehicle. The best lights have adjustable beams to allow either close or distance illumination. Waterproof lamps have O-rings or other gaskets to resist rain and sweat. Dive headlamps are completely sealed and submersible. Cavers often use long-lasting carbide lamps. Carbide lamps are also called acetylene lamps. They are simple lamps that produce and burn acetylene (C2H2) that is created by the reaction of calcium carbide (CaC2) with water (Figure 94-4).



Batteries influence brightness and duration. Batteries are either disposable or rechargeable. Disposable (alkaline or lithium) batteries have a shelf life of 7 to 10 years and are less expensive. Rechargeable (nickel cadmium or lithium ion) batteries, although initially more expensive, are less expensive in the long run if frequent use is needed. Because of a higher energy density than that of disposable batteries, a brighter bulb or LED can be supported. Large battery packs, such as those stored on the back of the helmet or on a waist belt, provide much longer life. Remote battery packs can also be stored under clothing and kept warm for more effective operation. For storage, the longevity of a battery is improved if stored cold.




Lanterns


Lanterns are valuable for base camp operations or on trips during which much light is needed after dark, such as when cooking for large groups, reading, or doing research. Liquid fuel lanterns burn white gas, a purified form of gasoline, yielding more light per pound of fuel than do battery-powered lamps. With a gas lantern, one should carry spare mantles and transport the lamp in a protective case. The mantles and glass globe are fragile, and gas must be stored safely. These lanterns become very hot. Hazards associated with liquid fuel are listed in Box 94-3.



Compressed gas lanterns that run on butane, propane, or a mixture of both are fuel efficient and lightweight. The gas is contained in a compressed cylinder and thus is not as messy as is liquid gas. For the same weight, these lanterns are brighter than are liquid gas lamps. Like white gas fuel lanterns, those with compressed gas have fragile globes and mantles.


Battery-operated fluorescent-bulb lanterns provide efficient, smooth, and usable light without the risks associated with fuel or the fragility of mantles or glass globes. These lanterns are replacing liquid and compressed gas lanterns. They are great for commercial trips, where one might have inexperienced campers who are unfamiliar with the hazards of lanterns, and for international travel, where breakage can occur.


Oil and kerosene lanterns have been replaced by the aforementioned liquid fuel, compressed gas, and battery-operated types. Lamp oil and kerosene are difficult to find, burn with noxious fumes, and are not practical for wilderness travel.


Candle lanterns are used occasionally by campers. These are simple and reliable, and emit minimal light that is bright enough for reading or eating, but usually not enough for cooking or procuring water. They have an open flame, so they can burn the user or ignite tents, sleeping bags, or clothing.




Tools



Multifunction Tools


Recreationalists most often use a compact multifunction tool (multitool) or a pocketknife with accessories like bottle and can openers. Professional guides or outfitters may need a compact folding knife blade and a separate multipurpose tool with many tool components (Figure 94-5). See Box 94-4 for a basic idea of multitool components.




Most experts agree that a pocketknife or a pocket multitool with pliers is sufficient for emergency use or basic camp chores. However, multifunction tools do not work as well as do specific tools. For example, a real screwdriver may be needed to apply sufficient torque and control to repair a ski binding. To repair a broken bike chain, tongue-and-groove pliers are much easier to use than are small multitool pliers. If rafting, one may need a boater’s knife, rather than the small blade of a multitool, to cut rope.


At a minimum, a multitool should have pliers, wire cutters, knife blade, can opener, and flat and Phillips head screwdrivers. It is useful in many situations to have a saw, awl, tweezers, and scissors (Figures 94-5 and 94-6; Figure 94-6, online).



Multitools are available in two configurations. Some, especially the newest designs, are based on the platform of a pair of pliers. These tend to be heavier, but many wilderness enthusiasts and professionals agree that the pliers are indispensable for equipment repair. The second style is based on a folding pocketknife, such as Swiss Army brand. These contain many features and components but usually do not have pliers. Thus multitools based on pliers are usually preferred. Sometimes one chooses to carry a separate, larger knife, as described in the next section. If one carries a folding-knife style of multitool, then a separate pair of pliers should be carried.


Choose the multitool that fits specific needs by performing these comparisons between different models:





For specific applications, one may need specific tools. Mountain bikers need bike chain repair tools, a tire pump, a patch kit, an extra tube, and hex wrenches. Skiers and snowboarders need a No. 3 Phillips screwdriver for binding screws. Rafters need tools, as well as a pump and a patch kit, to repair a boat or an oar.



Knives


Generally knives exist in two basic forms: fixed blades and folding blades. Many survival experts feel that a nonfolding, fixed-blade knife is best. Folding knives are often more practical because they can be stowed in the handle, thus making them more compact. Persons who prefer a folding knife usually select one with a locking blade so that more force can be applied without risk for the knife folding accidentally (Figure 94-7). A fixed-blade knife provides greater structural strength for making kindling and other forceful maneuvers.






Sep 7, 2016 | Posted by in EMERGENCY MEDICINE | Comments Off on Nonmedical Backcountry Equipment for Wilderness Professionals

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