### Short answer
- **You’d see** a brilliant flash and an expanding cloud of debris/plasma, with sharp, high‑contrast edges (no atmospheric haze).
- **You’d hear** a crisp, broadband crack/boom as a pressure wave in the aether-sonis hits your ship, exciting the hull and cabin air; the hull would briefly ring.
- **Simultaneity** depends on the wave speed in aether-sonis. If its vibrational disturbances are massless and travel at c, the flash and the “sound” arrive together (within tiny emission/structure delays). If slower than c, the sound lags by \( \Delta t = d\,(1/v_a - 1/c) \).

### What you see
- **Flash first from your viewpoint**: a bright, brief burst and an expanding, sunlit-looking plasma/debris shell. Fine details remain razor‑sharp without air to scatter light.
- **Geometric dimming only**: brightness falls ~1/r²; no atmospheric attenuation.
- **Relativistic effects** (if ships have high relative speed): light is Doppler‑shifted and aberrated.

### What you hear
- **Aether pressure wave**: The explosion launches a spherical compression wave in aether-sonis. It couples to your hull, which then drives the cabin air and your eardrums, so you perceive an actual sound.
- **Crisp waveform**: With “perfect transmission” (no loss/dispersion), the spectrum reaches you cleanly. You’d hear a sharp crack followed by a short, lower‑frequency ring set by your hull’s resonances.
- **Loudness with distance**: amplitude falls ~1/r; close blasts feel like a percussive thump.
- **Doppler**: Relative motion shifts pitch and stretches/compresses the time history of the sound, just as with light.

### Do they arrive together?
- Let the ship–explosion distance be d, light speed c, and aether-sonis wave speed \(v_a\).
  - **If vibrational modes are massless ⇒ \(v_a = c\)**: flash and sound are effectively simultaneous, aside from microsecond‑level source/structural delays.
  - **If \(v_a < c\)**: the sound lags by \( \Delta t = d\,(1/v_a - 1/c) \). Example: at d = 1000 km, if \(v_a = 0.1c\), the lag is ~30 ms—barely perceptible; at larger distances, the lag scales linearly.
  - Hearing it before seeing it would require \(v_a > c\), which breaks relativity.

### Forces/feel
- The aether wave carries momentum and exerts a brief alternating pressure on the hull—a palpable “tap,” then decay as the structure rings. No continuous drag if the medium is lossless; just the transient pulse.

- In sum: a bright flash and, depending on \(v_a\), a nearly simultaneous sharp boom that excites the ship’s structure, with timing and pitch shifted by relative motion.