Security & recovery · 2 min
Keep a way back
Good security considers what happens after a device, account or familiar recovery method is lost.
✓ An open notebook / 01Small ideas.
Small ideas.
A wider world.
From a ship’s network to the light of distant stars. Clear explanations, visual stories and little experiments for curious minds.
New · Maritime cyber security lessons & scenarios ↗52 lessonsEN / VI / 中文6 learning paths
FIELD NOTES / 001
SEA · SYSTEMS · SKY ↗
01 / Foundations
Six ways to begin
Follow your curiosity. You do not have to know everything to start.
01
At sea
Signals, vessels and the systems that connect them.
6 lessons ↗02
Networks
Follow a packet. Understand the whole connection.
6 lessons ↗03
Security & recovery
Protect access. Keep a way back.
18 lessons ↗04
Marine electrical
From a simple circuit to power on board.
8 lessons ↗05
AI & learning
Ask better questions. Make knowledge your own.
6 lessons ↗06
Beyond the horizon
Light, time and the questions beyond our sky.
8 lessons ↗02 / The knowledge library
Start with one good question.
At sea · 2 min
When a ship needs help
GMDSS brings several communication methods together so distress information can reach the right people.
✓Marine electrical · 2 min
Voltage, current, resistance
For an ideal resistor under fixed conditions, Ohm’s law connects three quantities: V = I × R.
✓Beyond the horizon · 2 min
Looking far is looking back
Light takes time to travel. The view of a distant object arrives after the event that produced it.
✓Protect what matters. Keep a way back.Read the note ↗
03 / Bookshelf
A shelf that opens the sky.
Eight reading notes from Nguyễn Đình Thuyên’s personal bookshelf. Selected passages, enduring questions and a path into the science.
Bookshelf ↗