EU equivalents of US things

01 Apr 2014


Boat (27) 
Not the Boat (12) 


Recent articles

25 Apr 2017

Ubuntu 16.10 LXC host on ZFS Root, with EFI and Time Machine

Still completely unrelated to boats, but I needed somewhere to put this. Here is a blow-by-blow guide to installing a minimal Ubuntu 16.10 to a ZFS root, booted from EFI, which as used as a LXC host to act as an Apple "Time Machine" destination.
mike 25 Apr 2017 at 17:20
14 Mar 2017

How to connect any serial device to the internet

A completely generic script that will proxy serial devices over HTTP, turning USB-things into internet-things.
mike 14 Mar 2017 at 23:00

Materials and metrics cheat-sheet

This is partial and growing list of equivalents for the various US-centric weights, measures and materials that I've found referred to when trying to source materials for the build - primarily for my reference.

Electrical Wiring

Cross section Nearest AWG Amps at 60° Crimp connector
0.75mm² 19, 18 6 Red
1mm² 17 8 Red or Blue
1.5mm² 16, 15 12 Blue
2.5mm² 14, 13 17 Blue
4mm² 12, 11 22 Yellow
6mm² 10, 9 29 Yellow
10mm² 8, 7 40 -
16mm² 6, 5 54 -
ISO10133 requires minimum 1mm² for conductors, or 0.75mm² for wiring internal to the fusepanel or in multi-core cables. Here's my pin-up cheat-sheet.


  • 316 stainless steel is known as A4, 304 is known as A2
  • T6061 aluminium is hard to find, T6082 is a replacement and much easier and cheaper to source
  • G10 (composite sheets, eg Tufnol 10G/40) has been largely replaced with FR4 (eg Tufnol 10G/41), which is structurally identical but also fire-resistant
  • Lexan polycarbonate, a clear UV resistant actylic good for windows, is the same as Makrolon AR2 - Makrolon is by Bayer (DE), Lexan by SABIC (SA)
  • Dyneema and Spectra are virtually identical forms of UHMWPE, Dyneema is produced in the EU, Spectra in the US
  • Dyneema - SK60 was the original, has been replaced by SK75 for most marine use, SK78 is a more robust version for long-term static loads
  • "Amsteel blue" is a particular brand of single-braid SK75 Dyneema core (Amsteel gray is SK60)
  • Boatlife Lifecaulk Polysulphide sealant is imported (and expensive), Arbokol 1000 is UK made and cheaper

Bolts, ropes, round things, flat things

  • 1/2" ≈ 12mm
  • 3/8" ≈ 10mm
  • 5/16" ≈ 8mm
  • 1/4" ≈ 6mm
  • 3/16" ≈ 5mm
  • 1/8" ≈ 3mm
  • 3/32" ≈ 2.5mm
  • 1/16" ≈ 1.5mm
All hail the metric system!