A vessel engaged in Pilotage Duties tied to the pier

This vessel is NOT Underway

Fog Signal - They may sound the identity fog signal of 4 short blasts on the ships whistle as and when they want too.

Remember this is only sounded in restricted visibility

A vessel engaged in Pilotage Duties

This vessel in UNDERWAY

Fog Signal - If Underway but not Making way
2 Prolonged blasts on the ships whistle at intervals not exceeding 2 minutes and they may sound the identity fog signal of 4 short blasts on the ships whistle as and when they want too.

If Underway and Making way
1 Prolonged blast and they may sound the identity fog signal of 4 short blasts on the ships whistle as and when they want too.

A vessel engaged in Pilotage Duties

This vessel in UNDERWAY

Fog Signal - If Underway but not Making way
2 Prolonged blasts on the ships whistle at intervals not exceeding 2 minutes and they may sound the identity fog signal of 4 short blasts on the ships whistle as and when they want too.

If Underway and Making way
1 Prolonged blast on the ships whistle at intervals not exceeding 2 minutes and they may sound the identity fog signal of 4 short blasts on the ships whistle as and when they want too.

A vessel engaged in Pilotage Duties

This vessel in UNDERWAY

Fog Signal - If Underway but not Making way
2 Prolonged blasts on the ships whistle at intervals not exceeding 2 minutes and they may sound the identity fog signal of 4 short blasts on the ships whistle as and when they want too.

If Underway and Making way
1 Prolonged blast on the ships whistle at intervals not exceeding 2 minutes and they may sound the identity fog signal of 4 short blasts on the ships whistle as and when they want too.

A vessel engaged in Pilotage Duties probably over 50 metres at anchor

This vessel in not Underway

Fog Signal - A rapid ringing on the bell for 5 seconds
if over 100 metres then an additional
Rapid ringing on the gong for 5 seconds not exceeding 1 minute and they may sound the identity fog signal of 4 short blasts on the ships whistle as and when they want too.

This vessel because it's at anchor can sound Morse "R" which is short - long - short blasts on the ships whistle to tell you your too close and probably on collision course

!!! - Caution - watch these vessels !!!

The one on the left is a pilot vessel seen from astern (Underway) or at anchor under 50 metres in length (Not Underway)

The one on the right is a vessel engaged in fishing other that trawling seen from astern (Making way) or with gear out more than 150 metres on the surface (Underway but not Making way)