All answers start with B S

[Ladymojo]

eg Style of swimming - Butterfly Stroke.

1. Avian collision with the engine of a flying aircraft.

2. You can get pulled up by these if you wear a certain footwear!

3. Used in the coding of information in electronics and computers.

4. Neutral country between two larger, potentially hostile, countries.

5. Order given aboard naval vessels when action imminent.

6. Working period between daytime and night-time hours.

Any help much appreciated, Thankyou.

[wiggers99]

1. Bird Strike
2. Break Shoes
5. Battle Stations

[wiggers99]

2. Or Brake Shoes even - apologies

[WyeDyed]

3 Binary

[Calibax]

4 Buffer State

[Ladymojo]

Thankyou all very much for your help x

[Karal]

2. Boot strap