For those of you who regularly follow this blog (Thank you!), you’ll know that the past few weeks have been shortened to be 3 or 4 day work weeks by holidays and we have two more of those weeks coming up later this month.  However this week was a gloriously full five day work week and all of us on Team Möbius took full advantage of that as you are about to see in this equally full update post of all this past week’s progress.

We have also been seeing the weather continue its trending ever warmer and starting to feel like summer is already on its way.  The forecast for the week ahead is for daily highs to climb each day from 26C/75F today to 34C/93F on Friday!  Even this past we have had spectacularly blue skies, sun and even a full moon just to put the icing on top.  We’ll take it!

As in many other parts of the world, Turkey is also beginning to slowly reduce Corona based restrictions and this is our first weekend that has not been a mandatory lockdown for everyone.  From what we can observe from our apartment and my travels to and from Naval Yachts each day, it does appear that most people continue to take the situation quite seriously and even without mandated stay home policy, the streets and sidewalks continue to be even more empty than they typically were long before Corona became a virus rather than a beer.  While I have my concerns, I do hope that the gradual lifting of restrictions will not create a second rise of cases and deaths and we can all move forward to establishing an even more positive future than ever.

However that is all in the future and we’ll just have to wait and see but the progress on Möbius is very real and present so please join me in my typical deep dive into all that was accomplished by the eXtremely talented Team Möbius.


While our Aluminium team has been reduced to “an Army of one” for the past month, that one is Nihat and he had a stellar week.  Even better, we hear that Uğur and Okan will be returning on Monday so we hope that next week will surpass this one, which is saying something.

IMG_20200504_092607Any guesses as to where Nihat is here and what he is working on?

For those of you who might remember, I will make this is a bit like the old (invented in Briton in 1943), “Who Done It?” murder/mystery board game, called “Clue”.  So here are some Clues for you:

There is a reason Nihat is kneeling in the photo above.

There is a connection between what he is standing on and what is behind him and on the Left of this photo.
FF Batteries in BasementBy now most of you will recognize that this photo is taken in the SuperSalon, but that’s just to throw you off a bit as well as giving you the most revealing clue of all ……………………
IMG_20200508_124514Full marks to those of you who figured it out and won the game with your guess that it was


in the Basement,

working on the Battery Compartments

with his drill and tap.
IMG_20200504_092543The Aluminium aspect of this job involved him cutting the 5mm/ 3/16” AL plate for the lids on each of the three House Battery Bank compartments and then drilling and taping these for the SS Countersunk bolts to hold them down tight against their rubber seals around the perimeter.
XPM Electrical SystemFor those interested in such details, before I show you the initial installation of the batteries, this schematic overview of the electrical system on XPM78-01 Möbius might be useful.  Hopefully all self explanatory but post questions if not.

NOTE:  I have since expanded the House Battery Bank with an additional fourth bank so the House Battery Bank now consists of 24 FireFly L15+ 4V cells wired 6S4P.  So the new numbers are 24 x 4V @ 450Ah which adds up to 24V @ 1800Ah = 43.2kWh.

XPM 6P3S House BatteryIn the coming weeks you will see these batteries being wired up as in this drawing (just add the fourth bank of six cells on the Right) so I will leave a more detailed description until then.

And YES, Mea culpa, I am woefully behind in writing up and posting a Tech Talk on the whole battery system and our thinking behind the change to go with FireFly Oasis Carbon Foam L15+ 4V @ 450Ah batteries rather than the OPzV 2V Gel cells we had originally designed.

IMG_20200508_124514It is hidden from view by the floor plate, but each of these deep compartments have the 25mm / 1” thick Keel Bar running through their Center Line length where the two sides of the thick hull plates begin.  These battery compartments are therefore the exact same construction as all the individual fuel/water tanks which are an integral part of the hull and lie below all the floor plates in the boat. 

IMG_20200508_153636By placing the batteries down at the very bottom of the hull the lead weight of the batteries serve double duty as they are also part of the “lead ballast” of the boat.  Unlike the situation in most boats where the batteries have to be located relatively high up which is not a good thing, positioning the significant weight of all these batteries down at the lowest point position converts this to “good weight” and a very positive  part of the design in terms of stability and ride.

IMG_20200508_163241Nihat has previously installed a bottom AL plate that sits atop the Keel Bar and is bolted to L-Bars around the perimeter to create a very solid floor for each battery compartment.  Next, Nihat has placed one of the three White fiberglass Containment Trays inside the compartment before he carefully lowers each 4V battery cell into the compartment.
IMG_20200508_163302Each of these 4V @ 450Ah FireFly Oasis Carbon Foam batteries weighs 43Kg/94 Lbs so Nihat definately did the heavy lifting this week and I had Nihat show us his newly enlarged biceps, along with the results of his hard work with this now fully filled compartment.

Next steps are to build and install the battery hold down system and the ventilation ducting and then wiring them all up and installing the temperature monitors on each battery bank so stay tuned for more in the coming weeks AND that long overdue Tech Talk on the XPM Battery system.


Let’s continue with the electrical theme and go check up on all the work our other Army of One, our Chief Sparkie Hilmi, and see what he accomplished this week.

IMG_20200504_111031This is the “brain box” that controls the whole In-Floor heating system on XPM78-01 Möbius.  We have 3 independent zones, one for each interior floor area; Master Cabin, SuperSalon and Guest Cabin/Corridor.
Azel i-Link In Floor Heating control system sp83packageD508FWe are using this Azel I-Link 3 zone system which consists of the main control head you see above then three thermostats which go in each compartment. 
Most of the time you control the In-Floor heating with one of the individual thermostats and just access the main control for initial setup, programming, etc.  All just how we like our systems; smart, simple & efficient.

IMG_20200504_184737There is a nice little alcove or cupboard on your Left as you go up the stairs from the Guest Corridor to the SuperSalon that seemed to be the just right location so Hilmi mounted the I-Link Control Head on the side wall and started wiring it up.
IMG_20200505_104911Pretty easy stuff for Hilmi so he had it all wired up with the appropriately tagged cables in no time.

Next up for Hilmi this past week was more work on the extensive NMEA 2000 or N2K network and the equally extensive Maretron monitoring system so let’s move aft to the Workshop to see what he is up to there.
IMG_20200506_123016 On the Starboard/Right side of the Workshop down by the Day Tank he is preparing to mount four of the many Maretron Black Boxes, which are hiding inside those White boxes and will soon be mounted up on the top Right area.
Mobius rev 2 pngThe individual Maretron “Black Boxes” are located in multiple clusters throughout the boat to keep them relatively close to the sensors which feed into them and as per Christine’s schematic each BB is connected to the N2K Backbone which creates the overall Maretron network.
IMG_20200507_101341There is a long box running the full length of both sides of the Workshop to make the transition between the AlucoBond covered Workshop walls and these create an ideal area for locating things like the Maretron BB’s. 
These corner transition “boxes” are a simple L shaped bend of AlucoBond which attaches to the AL L-bars you see running the length of these upper corners and will keep the Maretron BB’s and cabling well protected but easy to access.

IMG_20200507_101347The purplish block on the far Right here is one of many Turk N2K multi-ports which think is far superior to having a whole series of individual N2K T’s for each of these drop cables coming from each Maretron BB.
IMG_20200508_095549Same type of installation of more Maretron BB’s over on the Port side of the Workshop up by the WT door leading into the Corridor.
IMG_20200508_124237Moving up into the aft end of the Galley in the SuperSalon Hilmi took advantage of this area that will soon be covered by the Turquoise marble countertops, to install this run of five flexible conduits you see here.  These are all currently empty because they are part of our efforts to “future proof” these boats which in this case is to make it relatively easy to install any additional circuits we might want for additional electrical devices in the future.

Wiring for all the existing equipment is already installed and mounted to the White cable tray you can see on the far Right here.

IMG_20200508_124253Hilmi is installing these in any spots where future access will be difficult once all the furniture is installed.  This is looking at the ends of those 5 conduits which would be right above where the camera was to take the photo above.
You can see that the Gray flex conduit is empty and will just sit in this spot that can be easily accessed through the ceiling of the Guest Head below which you can just see through one lighted opening in the upper Right corner.


Looking around elsewhere in the SuperSalon we can see that Omur and Selim were equally as productive in their masterful cabinetry work.  This week the focus was up high putting in the soffits that make the transition from the windows/walls to the ceiling and then down low putting in the plywood flooring.
IMG_20200505_104955Selim picked up where he left off last week, installing the last few jigsaw puzzle pieces of the 12mm / 1/2” marine plywood flooring.  The darker square above his hands is the 50mm/2” thick laminated mounting platform for the base of the Helm Chair which will be through bolted in place. 
The rest of the plywood covers the 50mm / 2’” pink insulating foamboard which will soon have all the PEX tubing for the In-Floor heating snaking through it.

SSalon flooring 2After a quick vacuum and sweeping this is what the overall floor looks like and starts to give us a better sense of why we named this the Super Salon. 

You are looking towards the Bow in this photo with the Main helm up near the top, dinette L-seating on the Right and Fridges and Freezers on the bottom Left.  The large open hatch provides access to the eXtremely voluminous Basement which is below the entire floor of the SSalon.


IMG_20200504_122654Up above, Ömür and Selim have been very busy installing gridwork for all the removable ceiling panels.  This is the dropped ceiling area above the Main Helm. 
The five 100mm vent ducts bring fresh air that is forced through those slots in the underside of the Pilot House roof into a plenum above this AL plate.  White diffusers will fit into each of these vent ducts and allow you to adjust air flow and direction much like side vents in your cars dashboard.

IMG_20200504_154528After installing the black ceiling grid you see above they quickly build these templates to get the intricate shapes just right and then use these to cut out the individual plywood ceiling panels.  All plywood ceiling panels will be upholstered with White leather for the main areas and Black over the Helm to reduce night glare. 
IMG_20200505_104957These templates are a very fast and accurate way to cut each piece of marine plywood to just the right size so Ömür quickly has the middle Helm ceiling panel all ready to be fitted.

IMG_20200505_154440I wasn’t fast enough to get a photo of them installing the FastMount clips so let’s just say they are called FastMount for a reason! They soon have all three of the ceiling panels snapped in place over the Helm.

Throughout the boat, all ceiling panels are similarly removable and snaps into the ceiling grid using more of the FastMount system you’ve see in many previous posts.


Before they can work on the Ceiling panels and grid system for the main ceiling, they needed to install the multi part soffit boxes which run along the tops of all the windows and make the transition to the ceiling. 

In the photo above, we are looking at the aft wall of the Galley on the Right with the spiral stairs taking you up to the SkyBridge just outside on the Stbd/Right side of the Aft Deck.  The White L-shaped box section is the the first part of the Soffit and then a second L-shaped box will be mounted to this.

IMG_20200507_182729Looking all the way along to the Left of the Soffit above to the forward end of the SuperSalon, Ömür is fitting this second part of the Soffit system with this angled piece that connects the side Soffit to the Black dropped ceiling over the Helm on his Left.  These L shaped Soffit boxes will run along the entire perimeter of the ceiling/windows.
IMG_20200506_095940Standing up near the Main Helm looking Aft along the Port/Right side of the SuperSalon you can see how the first half of the Soffit system has been installed and runs the full length of the windows on this side.  On the upper far Right you can see the start of the Black Soffit as the blacked out Helm ceiling begins.
IMG_20200506_181737For those whom I haven’t completely lost and totally confused, yet, (but give me time), we have now moved all the way Aft along that Port side Soffit above and we are standing on the landing between the two stair cases, Left one leading up though the WT Entrance door out onto the Aft Deck and then the other stairs on the Right leading down to the Corridor and Guest Cabin area which you can see at the very bottom of this photo.

IMG_20200506_181743The Soffit above this Aft Window is taller than the others because the large extraction air fan is behind the Right side of this panel taking air out of the SuperSalon through the Upper Aft Wing Box which is above those two pipe posts of the Arch you can see through the window in this photo and the photo above.
IMG_20200507_182645Standing in about the same spot as above and turning 180 to look forward again, this is how the second L-shaped half of the Soffit system is attached.  There will be “mini” leather covered ceiling panels that snap in place to the grid that the underside of these Soffit frames provide. 

IMG_20200507_182712Walking forward towards the Helm you can see how both halves of the Soffit bend to meet up with the dropped ceiling above the Helm.  As much of the plywood as possible has been cut out of the Soffits to help keep weight down in these higher areas and also to provide me plenty of access to wires and hoses in these upper corner areas. 
IMG_20200508_123726Looking directly across the Helm area, the Stbd/Right side gets the same Soffit treatment.
IMG_20200508_165009Walking diagonally across the SuperSalon to that Aft Port corner near the Entry door and stairs again, you can make sense of why the Aft Soffit board is taller and its upper Right corner cut away you can see the round opening (click to enlarge any photo) where the extraction fan will soon be attached. 
FYI: The ceiling panel that snaps into this Aft corner will have a vent in it to allow air to be pulled from the SuperSalon.


IMG_20200507_121550Staying in the same spot in the Aft Port stairwell but switching Cabinetry teams, take a look at this most recent example of Omer’s master craftsman skillset!  He is doing the final fitting of this Rosewood Window Sill that has recently emerged from the Finishing Shop.
IMG_20200504_111233_MPHere is what that Window Sill looked like on Monday as Omur was finishing building it.
IMG_20200507_121702And here is what it looked like yesterday, Friday when you are standing in the Entryway door looking down the stairs into the Corridor.


IMG_20200506_153638Moving down into the Guest Cabin we get to see what took up the majority of Omer’s time this week as he finished installing these truly gorgeous Rosewood Hatch Liners. 
The huge 700mm/28” square hatch  on the Left is over the pull out bed/couch and the smaller 450mm/18”  hatch on the upper Right is above Christine’s head when she is working at her Office desk which is on the far Right bottom corner.

IMG_20200506_123551Viewed from up above on the Aft Deck this is the large Hatch Liner being carefully positioned just right with some wood wedges to get the space for the rubber Hatch Seals perfectly even on all sides.

IMG_20200506_153638Once he is happy with the alignment, Omer can wedge and clamp the liner in place.

The Pullman Berth bed folds down out of the large rectangular cabinet on the Stbd side wall.
IMG_20200507_120817With the Hatch Liners in place he can now finish fitting the removeable ceiling panels. 

This shot will help you see how the FastMount sockets work with the White Female sockets clearly visible in the Black painted ceiling grid where …..
IMG_20200507_120755_MP…. Black male FastMounts in the ceiling panel around the smaller hatch will soon snap into.
IMG_20200507_182546And look like this!
IMG_20200507_182603Turning a bit to show you this better shot of Christine’s Office Desk and bookshelf. 

More FastMount sockets in the walls where ……..
IMG_20200508_100330 …… the Green/Gray leather upholstered Wall Panels will snap into.
IMG_20200508_123504Like this one on the opposite side wall above the other set of bookshelves. 

Another large upholstered wall panel will soon snap into the lower wall below the bookshelves and a small one will snap in place in the upper Right corner which will make it easy to access that electrical junction box you can see inside.


IMG_20200508_095729On our way out of the Guest Cabin we get to check out the latest addition Omer has added to the Guest Head/Bathroom; this Goldilocks White sink!
IMG_20200508_095656Finding the just right sink for this spot is a whole story in itself and we are delighted with how well it fits this space.


IMG_20200506_095440_MPFinally, we catch up with who might have been the busiest beaver of them all this week; our Master Plumber and bracket maker, Cihan!

One last game of Clue for today; What is your “Who done it?” guesses for what you think Cihan is quickly covering up here?
IMG_20200505_104814Does this help you guess?
IMG_20200505_153809One more Clue; they are going to be mounted to this bracket.
IMG_20200506_095443Full detective points if you guessed:

Plumber Cihan

In the Workshop

Mounting these three Fuel Manifolds.
IMG_20200505_153914The threaded ports will have SS ball valves in them soon and this will be Grand Central Station for everything fuel related allowing you to select which pump to use, which consumer to go to, etc.  The other set of fuel manifolds are in the Basement where you select which fuel tank to pull from or deliver to.
IMG_20200507_120719These manifolds also connect up to these Fleetguard fuel filters which you will see being mounted next week.  You can check back with last week’s post for more details on the fuel filtration system I’ve designed.
IMG_20200507_120727Pretty simple really as there will be double 2 stage filtration pairs like this with one primary filter and then a secondary fuel/water filter to follow.  Two of these pairs will be plumbed in parallel so there is always a fresh set ready at the turn of two ball valves.

One double pair for the fuel polishing with the Transfer Pumps and one matching set for fuel moving from the Day Tank to the two consumers, Mr. Gee our Gardner 6LXB main engine and the Kabola KB45 Combi diesel boiler.

This will all be much easier to understand as you see Cihan installing them so I hope that will help keep you coming back or more.


IMG_20200508_124731OK, I lied to you earlier.  One more quiz; any Clues Who Done This?
IMG_20200508_124751Does this zoomed out shot help you?

Plumber Cihan again,

In the Basement,

With his rivet gun

shooting the Hart Tank Tender system!
IMG_20200507_182845This is a bit of a “belts and suspenders” approach to ensure that we can always know the levels of any one of the 18 different tanks we have for Fuel, Potable Water, Gray Water and Black.  For those not familiar this is a very simple and dependable tank level system that we had on our last boat and is installed on thousands of other boats.
IMG_20200508_124818It works by having a small nylon tube that runs vertically down to the deepest part of each tank through a fitting like this.
IMG_20200508_124739Each of those tubes then winds its way to the control head which has been mounted to the big bracket in the Basement where all those other Fuel Tank Manifolds are.  One hose per tank.
FYI, for those who might wonder, that open pipe in the bottom Right corner of the Batter Bank lid is for the Battery Compartment ventilation system which helps keep it filled with fresh cool air.

IMG_20200507_182854To check the level of any tank, you press and hold the button for the tank # you want and then use the large knob on the lower Right beside the gauge to create a vacuum in that line which is pulling the tank’s liquid up to whatever height the liquid is at.  If you click to enlarge this photo you can see that there are two scales on each gauge, one for water, one for diesel and this tells you how full/empty that tank is.

Of course our high tech N2K Maretron tank level system is MUCH more accurate and visible on any screen or phone we want, BUT this Hart manual Hart Tank Tender system requires zero electricity and is so simple it is almost guaranteed to work and allow you to know what your tank levels are.

Once again; Smart, Simple, Efficient!
Now you know just how productive Team Möbius can be when we get a full 5 day work week!

Hope you enjoyed this weeks Progress Update.  I sure appreciate you taking the time to come along for this week’s ride and hope you’ll do so again next week.

As always, PLEASE contribute your thoughts and questions in the “Join the Discussion” box below.

Ciao for now.  Keep your distance and stay safe and positive.