init: seed content from candidature + mvp docs

content/docs-mvp/BOM.md

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+# BOM (Bill of Materials) — NowYouSea Station
+
+> **Goal:** cost a *low-cost* acoustic station using **current online TTC prices** (France/EU when possible), including **shipping** so we don’t omit it.
+>
+> **Shipping assumption:** delivery to **Vannes (56000), France** (placeholder address: *1 place de la République*).
+
+## Station — BOM
+
+| category | item | spec / model | qty_per_station | price_ttc_eur | shipping_ttc_eur | delivered_ttc_eur | lead_time | source_url | date_price | notes |
+|---|---|---:|---:|---:|---:|---:|---|---|---|---|
+| compute | Raspberry Pi 4 | 4GB | 1 | TBD | TBD | TBD | TBD | TBD | TBD | Find best mix (Amazon+EU) |
+| connectivity | 4G router | GL.iNet Puli GL-XE300 (OpenWrt) | 1 | TBD | TBD | TBD | TBD | https://www.gl-inet.com/products/gl-xe300/ | 2026-01-30 | Datasheet in `docs/datasheets/glinet_puli_gl-xe300.pdf` |
+| audio | USB audio interface | Roland Rubix 22 | 1 | TBD | TBD | TBD | TBD | TBD | TBD | Manuals in `docs/datasheets/roland_Rubix_reference_eng03_W.pdf` |
+| acoustic | Hydrophone | Aquarian Audio H3x (XLR) | 1 | TBD | TBD | TBD | TBD | https://www.aquarianaudio.com/h3-hydrophone.html | 2026-01-30 | Manuals in `docs/datasheets/aquarian_*.pdf` |
+| power | Solar panel | 100W monocristallin | 1 | 59.40 | TBD | TBD | TBD | https://innpo.fr/panneau-solaire/panneau-solaire-monocristalline-100w.html | 2026-01-30 | TTC product price; shipping TBD |
+| power | MPPT controller | MPPT 10A (12/24V) | 1 | 82.50 | TBD | TBD | TBD | https://www.solairepratique.com/regulateur-de-charge-solaire-mppt-10a-12v-24v-c2x39777933 | 2026-01-30 | TTC product price; shipping TBD |
+| power | Battery | AGM 12V 60Ah | 1 | TBD | TBD | TBD | TBD | TBD | TBD | Usable capacity often ~50% (rule of thumb) |
+| power | DC-DC for Pi | **Matek BEC12S PRO** 9–55V → **5V** (5A) | 1 | 21.90 | TBD | TBD | TBD | https://www.drone-fpv-racer.com/en/bec12s-pro-9-55v-to-5812v-5a-by-matek-10500.html | 2026-01-30 | On your Matek list; currently shown out-of-stock there |
+| sensors | Pressure+Temp | MS5837-30BA breakout | 1 | TBD | TBD | TBD | TBD | https://www.mouser.com/ProductDetail/Measurement-Specialties/MS583730BA01-50 | 2026-01-30 | Price parsing TBD |
+| sensors | Conductivity probe | TBD | 1 | TBD | TBD | TBD | TBD | TBD | TBD | TBD |
+| radio | AIS receiver | dAISy 2+ AIS receiver (USB + NMEA + WiFi) | 1 | TBD | TBD | TBD | TBD | https://www.mpis.fr/recepteur-ais/816-mini-recepteur-ais-daisy-2-wifi-nmea.html | 2026-01-30 | RF connector: **BNC** (per product photo). Power: USB 5V or NMEA 9–36V. |
+| radio | AIS antenna | VHF marine AIS antenna (156–162 MHz) + mount + **RG58 coax 3m** | 1 | TBD | TBD | TBD | TBD | TBD | TBD | Prefer **N-type antenna** for reliability; use adapter to **BNC** at receiver if needed |
+| radio | RF adapter | N ↔ BNC (as needed) | 1 | TBD | TBD | TBD | TBD | TBD | TBD | Choose exact genders once antenna+cable are picked |
+| cabling | XLR cable | shielded XLR, **20m** | 1 | TBD | TBD | TBD | TBD | TBD | TBD | Hydrophone→Rubix |
+| connectors | Underwater connectors | IP68 (pair) | 2 | TBD | TBD | TBD | TBD | TBD | TBD | Need best FR/EU source |
+| sealing | Cable glands/feedthroughs | IP68 | 2 | TBD | TBD | TBD | TBD | TBD | TBD | Need best FR/EU source |
+
+## Datasheets / Manuals (downloaded)
+
+Stored in `docs/datasheets/`:
+- Aquarian: `aquarian_H3n_manual.pdf`, `aquarian_H3dM_manual.pdf`, `aquarian_H3dX_manual.pdf`
+- Roland Rubix: `roland_Rubix_reference_eng03_W.pdf`, `roland_Rubix_setup_fra03_W.pdf`
+- GL.iNet Puli: `glinet_puli_gl-xe300.pdf`
+
+## Next
+
+- Add best-price sources for: Pi 4 4GB, Rubix 22, AGM 60Ah, XLR 20m, IP68 connectors, glands.
+- Fill shipping+lead time for Vannes 56000. (Some sites require cart; if blocked we mark as estimate.)