The task involves calculating the azimuth using the provided navigation data. Let's break down the given information to process it:

Provided Information:

1. Date: Thursday, 14 April 2016
2. Celestial Body: Sirius
3. BT (Board Time): 22:15
   • BT Relation: BT = GMT + 6 hours
   • GMT = 16:15
4. Analog Clock Time: 04:16:21 (need to interpret this in terms of GMT or BT alignment).
5. DR (Dead Reckoning Position): $19^\circ 14.2' \, \text{N}$, $088^\circ 02.3' \, \text{E}$
6. GP (Geographical Position of Sirius): $249^\circ 0.5'$
7. GK (Course Compass): $151^\circ 0'$
8. KK (Compass Course): $153^\circ 0'$
9. $V_{\text{log}}$ (Speed): 13.0 knots
10. Variation: $7^\circ 14' \, \text{W}$
11. Deviation: $3^\circ 0' \, \text{W}$

Steps to Solve:

The azimuth calculation generally involves:

1. Converting the time accurately to GMT for the calculation of celestial positions.
2. Determining the Local Hour Angle (LHA) using the observer's longitude and the Greenwich Hour Angle (GHA) of the celestial body.
3. Calculating the azimuth using navigational formulas, such as: $\tan Z = \frac{\sin LHA}{\cos LHA \cdot \sin \text{latitude} - \tan \text{declination} \cdot \cos \text{latitude}}$

Would you like me to extract exact numerical values step by step, confirm assumptions, or focus on any specific calculations? Let me know!