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2020-01-10

The Casio Pro Trek PRW-3000-1A

I’ve worn the Casio Pro Trek PRW-3000-1A for the past 1,746 consecutive days. This is probably the longest I’ve worn any watch that doesn’t say “G-Shock” on it.

The Pro Trek performs all the basic watch functions you’d expect: it tells time, it provides the current date and day of week, it has a stopwatch, and it has a countdown timer. It supports a second timezone, which I usually keep set to UTC for quick reference but is useful if I’m briefly passing through a different region. It provides sunrise and sunset times for current, past and future dates. These are not exact, but tend to be within 20 minutes of reality, which is close enough for planning purposes. It has four alarms, which I never use.

Beyond those basic functions, the PRW-3000-1A has two characteristics that differentiate it from other timepieces. First, it is both solar and atomic: the battery never needs to be changed, and the time is always accurate. (Eventually, I’m sure, the battery will no longer charge itself, but that doesn’t seem to be imminent.)

The second characteristic is that it is an ABC watch, which means it provides an altimeter, barometer, and compass. Of these three features, the compass is the most useful. It works great for identifying the cardinal directions when you get turned around. It can also store bearings in memory, but using something other than a real compass for actual navigation strikes me as silly. The watch can be configured with declination, but I always leave this off so that the compass points to magnetic north. I apply this strategy to all compasses and GPS receivers, ensuring that they always agree.

The barometer is neat, but not especially useful. I have not found the current atmospheric pressure to be advantageous information. The watch can be told to monitor the barometric pressure over a period, and then alert the user if it sees a rise or fall in pressure, which would indicate a change in weather (very roughly: a rising barometer is good, falling is bad). This is more useful than knowing only the current value, but it only works when altitude remains constant.

The barometer screen also displays a thermometer, but because the watch is worn next to skin I find that this reading is not an accurate representation of ambient air temperature.

The altimeter mode is more useful. The reading is based on barometric pressure. The watch can either convert the barometer readings to altitude based on its stored values from the International Civil Aviation Organization’s International Standard Atmosphere, or it can calculate altitude based on a provided reference value. With the latter option, you tell the watch the current altitude (based on a map reading, survey marker, etc) and the watch then uses changes in pressure to calculate the difference as you ascend or descend. This is how I use the altimeter, and I find the results accurate enough for my purposes (which tend to be “rough navigation”).

The watch features a trip recording mode, where it will periodically record altitude readings and then report back with your maximum altitude, minimum altitude, total ascent, and total descent. I’ve never used this.

I’ve been using the same nylon band that I hacked together 4 years ago. It works great. I repaired it once with my expedition sewing kit.

The watch remains in excellent condition. The bezel is scratched, but that has no practical impact on its function. The face itself has managed to resist all scratching.

The buttons are more exposed than a G-Shock, and they will sometimes activate themselves if I’m doing something like pulling my wrist through a tight cuff. These accidental discharges happen rarely and are only a minor annoyance, but I do wish the Pro Trek was available with the thicker bumper of the G-Shock. (Casio does offer ABC G-Shocks, such as the Rangeman GW9400-1B. I’ve not looked closely at these, but they are probably worthy of consideration.)

Kikuo Ibe’s original G-Shock DW-5000 is the watch against which every other timepiece should be judged. Today I would appreciate the addition of solar atomic functionality, which is available in derivatives such as the G-Shock GWM5610. I purchased the PRW-3000-1A in 2015 for $200, which is a little over twice the common sale price of the G-Shock. I think this has been worth it for the added functionality. Unfortunately the PRW-3000-1A is no longer available. The current equivalent of it seems to be the PRW-3100Y-1. Casio’s list price for this model is $320, which is more than I think the watch is worth. If my watch was lost, I would happily purchase the newer model (or an ABC G-Shock) for $200. If they wanted more than that, I’d likely revert to the solar atomic G-Shock GWM5610 for $80-$100.

2020-01-05

micro, gear, bicycle

I added a bottle cage to my rear rack.

A Cleaveland Mountaineering Fork Clamp Mount allows me to mount a King Cage to my old Tubus Vega rack, providing another option for carrying water. I’ve wanted something like this since I saw Logan’s Vega modification on bikepacking.com. Cleaveland’s mounts makes it easy.

I use Norma Torro Worm Drive Hose Clamps to attach the mount. These German made clamps are far superior to the Chinese hose clamps frequently found in hardware stores. The 9mm wide, 8-16mm diameter clamps are the right size for this job.

2020-01-04

water, gear

Sawyer Squeeze Filter Adapters

The Sawyer Squeeze water filter can attach directly to the threading on common disposable bottles. For other bottles you can aim the output freehand, or attach half of a Sawyer Hydration In-Line Adapter to a piece of hose and let that drip into your bottle. I prefer a closed system, both so that no debris fall into my reservoir while it is being filled, and so that if the reservoir is accidentally knocked over I don’t lose all the clean water. There are a number of adapters that can aid in this.

Previously I mentioned my hacked together solution for attaching a Sawyer filter to an MSR Dromlite bag. The Dromlite lid is 63mm in diameter and uses the same threading that is present on the majority of wide mouthed bottles, so I can use this adapter to attach the Sawyer Squeeze directly to a wide array of bottles: Nalgene wide mouth, Klean Kanteen wide mouth, Hydro Flask wide mouth, CamelBak Podium, and reservoirs like the HydraPak Expedition or bladders like the Source WXP.

This adapter – including the Dromlite cap – weighs 40 grams (1.4 oz). 18 grams (0.6 oz) of that is the Dromlite lid, so if I’m already packing a Dromlite the adapter only adds 22 grams (0.8 oz) to my load.

Last autumn I bought a Platypus GravityWorks Universal Bottle Adapter. This consists of an inner lid with nipple, and outer lid ring, and a protective cover for the clean side of the lids. To integrate this adapter with the Sawyer Squeeze, I cut a short length of hose. One end I shoved over the nipple of the GravityWorks Universal Bottle Adapter. The other end I attached to one part of another Sawyer Hydration In-Line Adapter.

This adapter – including the same length of hose as the Dromlite system, and both caps, and the protective cover – weighs 70 grams (2.5 oz). 20 grams (0.7 oz) of that is the protective cover, which I’m not sure is really necessary.

The inner lid of the GravityWorks adapter is tapered so that it can fit into a range of narrow mouth bottles. The Sawyer Squeeze is already threaded to attach directly to common disposable bottles, but this adapter also allows me to get a seal with the Nalgene Oasis canteen, the smaller part of the humangear capCAP, the Hydrapak Stow, Vitaminwater bottles, or Vapur bottles.

When the inner lid is attached to the outer lid ring, the adapter can then attach to the standard 63mm wide mouth bottle threading, giving me all the same capability I have with my modified Dromlite adapter. But the outer lid ring can also attach to bottles with narrower mouths. Specifically, it works great with Klean Kanteen classic bottles, HydraPak Seeker, Nalgene “Wide Mouth” 16oz HDPE (which has a narrower, 53mm “wide mouth”), and with my Zojirushi SM-SA48.

I also have a Jetflow 63mm adapter. This takes the standard 63mm wide mouth bottle threading and steps it down to the narrow threading used by the Sawyer filter and most disposable bottles. You can then attach the filter directly to the bottle lid rather than going through a hose like my other two adapters.

The Jetflow adapter is neat because you can attach a bottle cap from a typical disposable bottle to the smaller end and then use it as your normal water bottle lid. It turns the whole contraption into something like a humangear capCAP. The Jetflow adapter weighs 18 grams (0.6 oz). Add a lid from a disposable water bottle and the total weight is 20 grams (0.7 oz).

2019-12-21

review, gear, writing, radio

A Better Clipboard

One of the things I learned over the years at 2 Meter Critical Mass and other radio events is the value of a good clipboard. The Field Message Pad or Field Memo Pad or even the Field Notebook are great for my own notes, but when responding with a radio on behalf of an agency, said agency will probably have official log and message forms, and those forms will probably be on 8.5” x 11” paper. A clipboard is an important tool for making those forms usable in the field.

Many people end up with a Gibson approved Saunders Storage Clipboard. They’re nice, but too bulky for my tastes. I use a WhiteCoat Clipboard.

These clipboards are hinged, allowing them to fold in half. They are intended to be folded so that they fit in the pocket of a lab coat and protect patient information from shoulder surfing. But when folded they also fit well into a decent sized cargo pocket, or larger jacket pockets. Folding the clipboard also provides some protection to the paper itself. Even if you’re just putting it in a pack, it’s nice to be able to fold the board and not worry about the paper becoming wrinkled.

The WhiteCoat Clipboard is available with different quick reference medical stickers. None of these are extremely useful to me. I went with the EMT Edition because it has a scale for estimating pupil size, which is something I have struggled with in the past. I’ve considered printing my own stickers to put on the board – perhaps with some kind of radio reference material – but I haven’t decided what information would be useful to include.

A simple rubber band is available to secure the bottom edge of the paper. This is critical to one’s sanity in windy conditions. A pen clip to keep your Fisher Space Pen M4B close to hand completes the package.

The system is overpriced, but I am very happy with its functionality.

2019-12-20

review, gear, writing

The Field Memo Pad

While I still believe in the supremacy of the 4” x 6” Field Message Pad, there are times when something smaller is wanted. Perhaps you need something more pocketable, or you have little room in your bag, and you only need small sheets for incidental notes. For these situations I use the Field Memo Pad.

The Field Memo Pad is built around the Mil-Spec Monkey Notebook Cover Plus. This holds 3” x 5” top-bound spiral notebooks, such as the Rite in the Rain 935T. These notebooks are large enough for incidental note taking, and slide easily into a pocket. “Slide” is perhaps not the correct word when the notebook cover is added. The cover is made of Hypalon, which is quite tacky. However this is a feature, not a bug. When you are seated or kneeling and using your leg as a writing surface, the tackiness prevents the pad from slipping around, which is actually quite useful.

The rear flap of the notebook slides into a pocket on the front of the cover. An identical pocket sits on the other side of the cover. I use this rear pocket to hold a few business cards and a universal device reset tool (it’s also a great place for your Bogota Pi picks). An elastic band across the bottom of the cover marks your current page, making it easy to flip to wherever you left off when opening the notebook. Two elastic bands on either side hold writing instruments. I most often use these to keep a Fisher Space Pen 400B Bullet with clip and a black Sharpie Mini, though full-sized writing tools will also fit. The spiral binding of the notebook sits above the top of the cover, allowing the notebook to be opened and folded over completely.

The Field Memo Pad provides everything needed for an all-weather analog data dump, in a pocket friendly format.

2019-12-04

micro, gear, medical, water, ablution

I use my pressure cooker to sterilize equipment.

Sport bottles lids often have small nooks and crannies that are excellent for growing bacteria and difficult to clean by hand. I occasionally throw these lids into my pressure cooker with a steaming basket or trivet to sterilize them. Multiple studies show that a standard pressure cooker can be an effective alternative to an autoclave in austere environments. The general rule of thumb seems to be about 15 psi for 15 minutes, though 30 minutes may be a safer bet for medical instruments.

2019-11-23

gear, review, tea

Titanium Teaware

I keep a Snow Peak H450 Mug at work. This is double-walled titanium and as such is expensive and entirely unnecessary. But it is a luxury I enjoy, and I expect that (like most Snow Peak titanium products) it will last approximately until the heat death of the universe. As the name implies, it has a capacity of 450mL. It has an outer diameter of 86mm and a height of 97mm. This is the mug I use for my daily oatmeal and miso.

Tea is brewed in the mug using a FORLIFE Brew-in-Mug Tea Infuser, which fits perfectly in the H450. It is easy to clean, allows the tea to breathe, and lives up to its name as being something that ought to last for life.

The Snow Peak MGC-053 Lid fits on the H450 mug and provides a cafe style lid. A better option is the old, discontinued Klean Kanteen Pint Lid. Klean Kanteen made this for their pint cup, but it fits perfectly on the H450. It gives you a cafe style lid, and has a rubber piece that rotates into place to cover the hole that you sip out of. There’s also a sealed hole for a straw, though I’ve never used this (maybe you could use it for your bombilla if you were into such things). I would prefer the lid to be deeper, like the MGC-053, so that liquid that does splash up out of the hole has a better chance of being contained within the dish of the lid and then running back into the mug. However, the rotating cover of the old Klean Kanteen lid reduces the chance of liquid escaping in the first place. Neither lid is leak proof, and I rarely use either because I’m generally not moving around while drinking tea, but the Klean Kanteen Pint Lid lives in the small pouch of tea supplies that I keep at my desk. It will get slapped on if I’m walking someplace.

At home I keep a Keith Titanium Ti3521. Keith is a Chinese brand that previously was only available direct from the People’s Republic on AliExpress. In the past couple of years I’ve seen them start to be distributed directly stateside. The Ti3521 has a capacity of 450mL, an outer diameter of 78mm and a height of 125mm. Compared to the Snow Peak mug, it’s a little skinnier and a little taller. What makes this product unique are the lids. It has a silicone cafe style lid with a sippy hole that fits tightly over the rim of the mug. As with the lid options for the Snow Peak H450, this lid is adequate to protect from spills while walking with the mug. The Ti3521 also has a titanium lid. This can be placed directly on the mug, but it isn’t a tight fit and is mostly useless here. It is intended to be placed over the silicone lid, covering the hole you drink out of and providing further protection. The titanium lid has a small pin hole in it to allow heat to escape, so the setup isn’t waterproof – you certainly wouldn’t want to put it in a pack when it had liquid in it – but it will probably keep you from scalding yourself on a bumpy car ride.

The Ti3521 includes its own titanium infuser. The infuser inserts into the silicone lid and hangs down into the mug. The infuser is small, with a diameter of 42mm and a height of 78mm. Some teas, I find, need a bit more room to breathe. For those teas, the FORLIFE Brew-in-Mug Tea Infuser does fit in the Ti3521. But the Keith infuser works well enough for many teas. It has a larger volume than your typical tea ball or stick infuser, so if you are happy with those you’d probably be happy with this.

When new, the silicone lid did impart a strong silicone taste. Since I purchased the product direct from China, I have no way of knowing if the silicone is what the USA FDA would consider “food grade”. When I first received the Ti3521, I made a number of different attempts to reduce the silicone taste from the lid – boiling water, baking soda and vinegar, lemon juice, etc. Nothing really helped, but after just using it for a few months the taste finally went away.

I use the silicone lid to hang the infuser basket, and I use the titanium lid as a dish to place the infuser on when I’m done with it. I rarely drink through the silicone lid.

In addition to its use at home, the Ti3521 is the mug I’ll usually grab when travelling. I find that its skinnier-but-taller form factor tends to be slightly easier to slide into a pack than the Snow Peak mug, and I like that all of the components are more tightly integrated than the H450 and FORLIFE infuser.

I own a few other Keith Titanium products in addition to the Ti3521. My experience with them is that they are of a perfectly acceptable quality, though not quite as nice as Snow Peak. The Ti3521 is exemplary of this. When boiling water is poured into the Snow Peak H450, the outer wall is warm but comfortable to hold. When the same water is poured into the Keith Ti3521, the outer wall is hot. Not too hot to hold, but certainly hotter than the Snow Peak mug. I don’t know if this is because the Keith titanium is thinner, or because the walls are closer together, or because the vacuum between them is imperfect.

The Snow Peak H450 is part of a three piece set of nesting mugs. The H200 is the smallest of the set. I’ll sometimes use it if I have brewed tea in a pot and I want a cup that just holds a small amount, but otherwise it is not very useful. The middle-sized H300 is more interesting. It holds a full cup of tea and is a nice size to drink out of. It also just so happens that the 23.7 oz Smartwater bottle that I like to use as part of my backcountry hydration setup with the Sawyer Squeeze fits perfectly inside the H300 mug. By perfectly I mean that if the mug were a millimeter narrower the bottle would not fit. So if I want the luxury of backcountry tea brewed in something other than my cook pot, my setup is the Smartwater bottle, inside the H300 mug, inside the Hill People Gear 3” Bottle Holster.

For brewing, the lower portion of the FORLIFE Brew-in-Mug Tea Infuser does fit in the H300. But this is far too bulky for me to ever want to pack into the backcountry. A tea ball works, but those are always cheaply made with soft walls that flatten and small hinges that break. They don’t survive long in a pack. A stick infuser is too tall. I’ve successfully used a Tuffy Steeper with the H300 (an idea from Backpacking Light). When collapsed this is small and easily packable. When fully expanded it is roughly the size of the FORLIFE Brew-in-Mug Tea Infuser, though it tapers toward the bottom. However, it can be used when only partially expanded, which allows it to fit better into the H300. As with the silicone lid on the Keith Ti3521, the Tuffy Steeper imparted a strong silicone taste when I first bought it. Over time this has diminished, but I still sometimes notice it. Another option is the House Again Tea Ball Infuser. This is a bit larger than the typical tea ball, and much more robust. It fits in the H300 and packs well separately. Usually this is the option I’ll choose.

If I want to brew a pot of tea, I use the Fire Maple Titanium 1L Kettle – another AliExpress purchase. There is absolutely nothing special about this pot, except that it is titanium, and thus cool. It is single-walled, so it can be used on a stove or over a fire. I bought it after breaking a glass teapot and vowing Never Again. It also features some neat knot work on the handle, which I assume was tied by the deft hands of small children who sleep on the cold concrete underneath their workstations, piss in buckets, etc.

The Fire Maple kettle does have an extremely coarse strainer in the spout. If you’re brewing some sort of blossoming tea, it may work, but it isn’t great for the teas I typically enjoy. Instead I use the FORLIFE Capsule Infuser, which is a great big infuser that is meant to be used in a large pitcher. It is a good size for a 1L pot, and the lid will still fit on the teapot while the strainer is inside.

2019-11-20

gear, review, edc

Sonic Defenders

I carry earplugs everyday. Other people have written about the regular carry of earplugs – usually to aid sleep in foreign environments – but I tend to disagree with the products they choose. Craig Mod recommends the Mack’s Pillow Soft Silicone Earplugs. Tynan recommends the Howard Leight Laser Lite Foam Earplugs. I recommend the SureFire EP3 Sonic Defenders. Each of these are exemplary of a different style of earplug with different intended applications.

The Mack’s Pillow Soft Silicone Earplugs are different from many other earplugs. Rather than being inserted into the ear canal, they seal the conchal bowl. This makes them very comfortable, as there is no internal pressure in the ear, but also makes them less effective at blocking noise. They have a claimed noise reduction rating of 22 decibels. (When dealing with moldable plugs I assume this number applies when you install them perfectly, and that in common usage they’re probably slightly less effective.) I find this style of plug somewhat finicky to install and retain. If you find you cannot stand the feeling of having something in your ear canal, they are probably a good option. For everyone else, you can do better. I will sometimes use these plugs in the axolotl tanks (because water with such a high concentration of salt can be uncomfortable in the ear). In that scenario, I just want to seal my ears from water, but I don’t really care about the noise reduction. These earplugs work well there. If I regularly patronized a public pool I would use them there (because public pool water scares me). The earplugs are intended to be single use. You can reuse them, but the tackiness of the material means it picks up more dirt and is more difficult to clean than other single use earplugs. I haven’t bothered to reuse them.

The Howard Leight Laser Lite Foam Earplugs are a good option for side sleeping. They have a claimed noise reduction rating of 32 decibels. As with the silicone plugs, I assume they probably perform slightly worse than this in common practice due to imperfect installation. When properly installed these earplugs do block a surprising amount of noise, and they remain comfortable. They stick out of my ears somewhat, but because they’re just foam, any extra pressure placed on the outer end doesn’t translate to uncomfortable pressure in my ear canal. While intended to be single use, you can get a few nights of use out of a single pair. Sometimes I’ve woken up to find that one has fallen out, but I figure they’ve still done they’re job as long as I’m waking up naturally and not because of a disruptive noise.

For music events I have the Etymotic ER20XS Earplugs. They have a claimed noise reduction rating of only 20 decibels, but I feel that they do a good job of reducing sounds to safe levels without distorting the quality of the music. They are not appropriate for times when I want to eliminate as much outside noise as possible, which means they are not useful enough to carry everyday. I’ll often forget to grab them when heading out the door to a show. Or I’ll go to an unplanned show straight from some other location and not have the opportunity to pick up the Etymotics from home. (Prior to these I used EarDial Earplugs in this application. I find them both to perform pretty much the same.)

The SureFire EP3 Sonic Defenders have a claimed noise reduction rating of 24 decibels. I do not question this rating. Unlike with the moldable foam or silicone plugs, there’s really no way to improperly install the EP3.

I first got the idea of carrying the EP3 earplugs everyday a few years ago from a local FBI agent. He keeps them in his bag for unplanned gunfights. The unplanned discharging of firearms is pretty low on my priority list, and if I’m planning on discharging firearms or being in an environment where others are discharging firearms around me, my first choice for ear protection will be my Howard Leight Impact Sport Earmuffs with Noiseighter pads. But it got me thinking: if I was already considering carrying a general purpose, disposable earplug like the Howard Leight Laser Lites (which I had previously kept in my EDC first aid kit), why not just pack the EP3s that would otherwise continue to sit in my box of miscellaneous gun stuff at home?

I don’t think they have quite the fidelity of the Etymotics for music, but they certainly reduce the noise to a safe level, while still allowing me to enjoy the music. And with the filters open I can easily tune in to conversations around me, which I think is critical in environments like nightclubs (for both enjoyment and safety).

I find them comfortable enough to sleep in. They sit fairly flush with my ears, and so while they may not be quite as forgiving as Howard Leight foam plugs for side sleeping, I’ve never woken up after rolling onto my side while wearing them.

On their packaging, SureFire does list swimming as one of the activities for which the EP3 may be used. However, I think that earplugs like the Mack’s Pillow Soft Silicone Earplugs that seal the entire ear, rather than just plugging the canal, make more sense if keeping out water is your primary goal. I’ve never found myself unexpectedly underwater, so I’m comfortable not planning my EDC around this eventuality.

The EP3 earplugs have retention rings, which are sized to fit your conchal bowl. (I wear a size medium, which is what SureFire recommends for most adults.) This makes it very unlikely that the EP3 plugs will fall out, which is as useful for sleeping as much as it is for more exciting activities.

SureFire claims a service life for the EP3 of “6+ months”. My last pair lasted 42 months before I replaced them. Granted, I use them infrequently, but it’s safe to say that this style of ear protection lasts significantly longer than disposable-but-reusable earplugs like the Howard Leight Laser Lite and Mack’s Pillow Soft. I store them in the protective case they come in, and wash them with warm soapy water after use.

SureFire also offers the EP4. These are identical to the EP3 except that they have a triple flange instead of a double. I’ve never used them. I think the only reason to opt for the triple flange is if you have a long ear canal. With the filter closed, the noise reduction rating is the same on both models. With the filters open, the EP3 provide a noise reduction rating of 11 decibels while the EP4 bumps it up to 12. The EP7 has foam tips for a different feel and a higher noise reduction rating.

Earplugs are one of the least frequently used items in what I consider to be my level 2 EDC. If I was seeking to reduce the number of items in my pack, they would be a candidate for elimination. But the reality is that their small size and low weight make them easy to carry in a bag, and when I do need them I am very grateful to have them – whether that is because I’m sleeping elsewhere, enjoying live music, or things are going bang. The SureFire EP3 Sonic Defenders aren’t necessarily the most appropriate ear protection for every environment, but I think they work well in a wide range of applications. Their versatility, coupled with their longevity, is why I choose them over other earplugs.