Satellite Communications [Updated May-2017]

This is part of a series describing some of our common boat systems and their operation.

We refer to these often not only for our own use, but also when asked specific questions about systems on Denali Rose, and when participating in discussions on various forums.

We aren't implying our choices are the best or only way to go; they just happen to be the decisions we made [...or sometimes what came with our boat...]

And since we are talking about electronics, in the future our choices in this post may become dated and/or obsolete, so we will endeavor to keep this information current regarding what we have and use, and what we are researching/considering for the future.


––––– Updated 18-May-2017 [by Bill] –––––



Satellite Communications:

We have HAM and Marine SSB radio capability [with DSC and packet modem] onboard, and used long distance radio exclusively [with SailMaillast time around [on a different vessel...]

This discussion is about augmenting that long distance radio capability on our current boat with Satellite Communications; why we did, and with which device(s) and service(s). 
Keep in mind we are speaking from the perspective of typical small sailboat cruisers on a budget- us. Therefore, systems requiring a dome are beyond the scope of this discussion. [Not to mention our needs and budget...]
When shopping satellite communications choices, don't start with the hardware: begin with the service area(s) covered. Many intriguing bits of kit are limited to specific geographic regions of the world. [e.g., the Thuraya smart phone sleeve that converts a smart phone to a sat phone doesn't currently work on the N. American continent except in cell phone mode- which the smart phone already does all by itself...]

From our research, [through Feb-2017] if you want to use your satellite communications device anywhere in the world, Iridium is your only choice.

But which satellite device? Delorme InReach? A sat phone? Iridium GO!? 

It depends upon your communication needs. 
Our requirements include voice, email, text messaging, and SOS.
We have only had experience with Sat phones, and they have proved intrinsic for remote medical support [voice, email, and text messing.] 
Unfortunately we have put this to the test [successfully] during past serious [but not necessarily life threatening] medical events occurring in remote areas where we were on our own... Therefore we will always have a sat phone [or similar device] for voice comms. We are also both trained EMTs [Emergency Medical Technician] because remote support is not as effective nor efficient without some first responder knowledge... I couldn't imagine having to choose between using my hands to render critical first aid, or clean them up and type text messages to a remote support entity instead...
What about an SMS [i.e., texting only] device like a DeLorme Inreach? Isn't that cheaper? 

Not necessarily... We have evaluated some SMS satellite comm devices, and even provided weather support [feeds] to cruising friends who use them. 

Upon considered evaluation, we found them to cost about the same as a sat phone and plan for what we do [and they could only perform 2 of our 4 requirements; SMS and SOS] so we prefer the more capable Sat Phone for now... [There are more details in our blog post discussing this comparison.]

What about an Iridium GO! with an unlimited data plan?  

Very enticing, and discussed in more detail, below.

We ended up buying an Iridium Extreme [9575] with a passive external antenna in May-2014 [before the Iridium GO! was released] so that is what we have experience with so far...
Side note: As of May-2017 the 9575 is still the current model from Iridium- with a cousin that includes PTT (Push-to-Talk radio like) capability- for extra airtime plan fees... 
We use the sat phone almost exclusively with UUplus for extraordinary email, SMS, and file [think weather] transmission performance. [UUplus Personal version still pays for itself- ofttimes more than twice- in sat phone time saved each month. A technical overview describing why is included below...]

We chose Iridium because of their proven and dependable coverage at higher latitudes.
Shop your desired sat phone airtime plans carefully; reseller pricing and contracts vary greatly.
We chose the Iridium Extreme [9575] over the prior Iridium model sat phone [9555] for multiple reasons [e.g., the slightly higher cost (~12% at the time) was worth it to us...]:
  • Ruggedized
  • Water and dust resistant [IP65]
  • GPS built-in [Handset must have clear view of sky; external antenna has no GPS...]
  • SOS [via GEOS- like devices from Spot, DeLorme, etc.]
  • Direct USB connection to laptop computer [i.e., no intermediary black box required]
Side Note: There are many businesses that rent satellite phones by the day, week, and month. [e.g., Here is the source we have used in times past- and where we ended up buying our complete 9575 kit. They ship (US) nationwide and rent complete kits including a spare battery for US$225/month + airtime.] 
This is what we did for finite duration land and sea based excursions before we could justify owning our own satellite phone.
What is our typically daily usage while boating? 

Email, SMS [text] messages, daily [or sometimes twice daily] weather files including text forecasts and discussions, GRIBs, Weather Fax charts, satellite imagery, etc. All of this is as needed... [e.g., Many times we don't download the WeFax or GRIB files because the text forecasts and Forecaster's Discussion may suffice for our needs at that moment.]
See our Weather and Computers, Devices, and Applications pages for links to the weather resources we use...
All of this is accomplished using UUplus. [Our sat phone alerts us- for free- when a new email or SMS message is received so we only check UUplus then, or when we have something to send, or wait until the next Wx file session- all of which we choose to initiate manually so we don't have any surprise sat phone bills...] 


What about an Iridium GO!?

I suspect a sat hot-spot device [e.g., an IP device like the Iridium GO!] is in our future. 

However, we aren't there yet because based upon our current usage and Alaska-Canada only sat phone plan [US$1/minute] the GO! unlimited data plan [US$125/month] would cost us four times what we now pay- including our UUplus subscription. [But the data would be unlimited... more below...]

Once we either start needing an additional 1,000 minutes per year on a regular basis [this in addition to the 400 minute minimum we purchase now; 200 mins every 6 months...] on our current plan [or when have to switch to International minutes at US$720/year for 500 minutes] the Sat Phone approaches the cost of an unlimited data plan for an Iridium GO!- but without unlimited data. [This will likely be one of our primary tipping points for that decision.] 

For example, our current sat phone plan [Northern Lights Plan- Alaska and Canada only; shop carefully!] requires a minimum of 200 mins every 6 months [US$204: Iridium increased the price to US$245 in Feb-2017] for data to roll-over, and can only be bumped in 200 min increments... [Here is a blog post with a bit more detail about our sat phone plan if you are interested..]

If/when we obtain an Iridium GO!, it will connect to the same external antenna we use now, and the 9575 will be kept on hand for land and emergency use, and as a back-up to the GO! for email, etc. 

Wait; you plan to pay for two active Iridium devices? 

Probably not...

An alternative to keeping two Satellite SIMs active is to use the GO! SIM in the Sat phone in emergency situations as needed. 
The SIM card for an Iridium GO! is verified compatible with our Iridium Extreme (9575) sat phone (and the prior 9555 model as well...) Therefore our future strategy may be to use the GO! with its unlimited data day-to-day and in the event of an emergency, transfer the SIM to the sat phone. [Note: The unlimited data does NOT transfer to the Sat phone; you would be using voice minutes for voice and data. All the more reason to keep UUplus active...]
Another factor that would make an Iridium GO! even more enticing [with an unlimited data plan] is once Iridium activates their new satellite constellation, Iridium Next [slated to go live the end of 2017] with improved data speeds. 
Iridium Next Notes 
  • Remember it won't go live until the end of 2017 2018 at the earliest... 
    • Update 14-Jan-2017: On this date Iridium successfully deployed their first ten of seventy new satellites with one SpaceX rocket launch... Six more launches to go...  
    • Update 15-Feb-2017: Per Iridium newsletter today, SpaceX launch delays will now schedule last satellite launch mid June 2018.
  • It is unconfirmed whether the current generation of GO! devices will be able to take advantage of the Iridium Next increased bandwidth. 
  • Purportedly the 9575 can use the faster speeds, but this is also currently unsubstantiated by the vendor. 
  • There is also no information about pricing for the faster speeds and new service levels Iridium Next will accommodate.

eMail, Weather, news, and document retrieval: UUplus:

The service we use with our Iridium sat phone is UUplus Satellite email. [Personal Edition. Requires a computer and runs on 3 OSs: Windows*, Mac OS X, or Linux] 
* May-2016; per UUplus regarding Windows 10: 
There is a bug in the Iridium USB driver for the 9555/9575 that messes up the RUDICS connect on Win10. No problems with Win8 and Win7 [and Mac OS X] (we no longer support XP). Iridium knows about the bug but hasn't updated the driver since 2012.
UUplus works over any internet connection- i.e., it is not limited to sat phone only use; unlike the email software that comes with the GO! This means you can set it up and use UUplus on WiFi or cell data as well as your sat phone. 

For us it saves a lot of air time through efficiencies gained via compression and connection efficiency using Iridium RUDICS data optimization service. [
RUDICS is not available via the Iridium GO! since that is an IP device, but the unlimited data plan partially mitigates the advantage of quicker dial-in connection time and optimized data transfer... ] 

UUplus has a pretty complete database of web data and SailDocs requests built-in [and you can create your own requests] so you can download GRIBs, WeFax, NAVTEX, text Wx forecasts, news, etc.

More about UUplus [and GO!: With technical details provided by UUplus from their recent testing using an Iridium GO! on their office rooftop- i.e., without an external antenna...]

How does UUplus more than pay for itself for us on our Iridium Extreme [9575] model sat phone? 

UUplus can communicate directly with the modem in Iridium [and perhaps other] sat phones. And UUPlus also uses Iridium RUDICS data optimization service [with no additional cost...]

This allows it to bypass the usual internet protocols [e.g., Unreliable PPP for connections, and overhead intensive TCP] in favor of a hybrid protocol [a variant of UUCP] optimizing throughput over slow and relatively high latency sat phone connections. 
For example, a typical UUplus session takes about 15-20 seconds to log in and begin data transfer [compared to almost a minute without UUplus.]

Within the first minute, UUplus has connected and downloaded an uncompressed 40k of data.
Without UUplus, the first minute is consumed connecting to the service... [Yes, this is unimpressive by today's broadband standards, but this is 80s era satellite technology we are talking about, and our text only email and the Wx files we choose are correspondingly small in size.]
Note: [per UUplus Nov-2015]: the throughput optimization gained with a sat phone using UUplus will be diminished somewhat with an Iridium GO! because a GO! is [currently] dependent upon Internet Protocols [PPP and TCP] since it allows smart phones to use [specific] apps online. 
This also means the GO! cannot use the Iridium RIDICS data optimization service, so those gains are also lost. 

However one could argue these losses [i.e., more dropped connections and slower performance] are partially mitigated by an unlimited data plan... Time will tell...
Position statement: It is worth reiterating that regardless of whether we ever acquire a sat hot-spot device like the Iridium GO!, we will always keep a sat phone onboard because it is currently the least complicated communications device in an emergency.

The Iridium GO! is dependent upon smart phones [with one exception- keep reading...] so that is 2+ devices that need to be grabbed {and have fully charged batteries} adding more complication in an emergency situation with one recently discovered [yet undocumented] exception:

Per Navigation Mac, the GO! can function as a speaker phone, but only when the SOS button is activated. This reduces the dependence on smart phones for voice comms in an emergency. [The speaker phone on SOS functionality is undocumented by the vendor, Iridium. We prefer to not count on undocumented features...]

I also suspect a speaker phone capability would not be very useful if there was a lot of ambient noise from stormy weather, etc. and I have as yet no first hand nor vendor verification of this capability.

Since, as mentioned above, the GO! SIM card will work in the Iridium Extreme [and the prior Iridium model 9555] it is easy to justify keeping the sat phone should we ever convert over to an IP satellite device like the GO!.
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2 comments:

  1. Keep your E9575 it is a lot better then the Iridium GO.
    Iridium will soon come with more speed and I thin the 9575 is set for new times, the Go is not set for higher speed.

    ReplyDelete
    Replies
    1. Thank you, Geir.

      We are very pleased with our Iridium Extreme [9575]. It is really all we need at present.

      We have also been following this as well, and also wonder if there will be higher fees once faster data rates are available.

      The outcomes of Iridium's new satellites [2 in orbit being tested now...] in the next year or two will be very interesting for us all.

      Delete

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