Gunnery Officer



Information Sheet Number: 1.11



The Combat Systems Smooth Log is an invaluable document if it is maintained properly. During a typical Gunnery Officer tour, many entries are made with respect to the gun weapon system. The smooth log is a source reference for historical data of all weapons systems aboard the ship. It is used for inspections, material readiness and operational documentation.


(a) NAVSEA SW225-AO-MMA-010/OP 762 Theory of Combat Systems Alignment

(b) COMNAVSURFLANTINST 9093.3 Combat Systems Officer Manual

(c) NAVEDTRA 12970 Principles of Naval Ordnance and Gunnery



1. Hard copy documentation of:

a. Repairs and modifications

b. Inspection results

c. Ordnance expenditures

d. Firing reports

e. Material certifications

f. Cutouts and benchmarks

g. Explosive mishap reports

2. Its value is directly proportional to updating frequency.

3. The CS Smooth Log is the document for historical data and is often referenced by the Board of Inspection and Survey (INSURV).



1. The Combat Systems Officer (CSO) is ultimately responsible for the document's accuracy.

2. Each C/S division officer is responsible to the CSO for making applicable entries into the smooth log.


1. Alignment

a. One subsection for each piece of alignable equipment should contain the following information:

(1) Installation and overhaul data, including dates, type of work completed, repair facility and the point of contact.

(2) Ship's Training and Alignment Verification (STAV)

(a) Assist visit by local Fleet Technical Support Center (FTSC)

(b) Trains the ship's personnel in alignment procedures

(c) Conducts tests to determine and verify mechanical accuracy and alignment

(d) Conducts precision measurements and establishes accurate references for alignment

(3) The very first item in the smooth log should be the NAVSEA weapons certification for each weapons system.

b. Bench mark readings

(1) Readings are used to detect mechanical slippage and calibrate zero train and elevation.

(2) Bench marks are engraved metal plates secured to fixed points on the ship's structure. A gun or director is ordered to a specified train/elevation and optically verified against the bench mark.

c. Tram readings

(1) Horizontal reference plane verification

d. Roller path data (including plots)

e. Firing cutout zones

f. Radiation cutouts

g. Record of all alignment checks conducted

2. Calibration section

a. One subsection for each alignable piece of equipment (as applicable) containing the following information:

(1) Antenna alignment

(2) Double echo checks

(3) Range zero adjustments settings

(4) Sonar calibration and source level checks

(5) Frequency settings

(6) Record of monthly transmitter/receiver checks

(7) Power out/receiver sensitivity

3. Rangefinder calibration section

a. Date and range to target used for calibration

b. Internal adjustment settings

c. Overhaul data

d. Erosion data

(1) One subsection for each gun barrel containing the following information:

(a) Bore erosion

(b) Projectile seating distance gauge readings

e. Boresearch results

f. One copy of each star gauge report

4. Rounds fired section

a. One subsection for each gun barrel or launcher rail (as applicable) containing the following information:

(1) Date of firing

(2) Number of rounds/missiles fired

(3) Type of projectile or missile

(4) Type of powder charge (guns)

(5) Shots per gun per minute (estimated)

(6) Total rounds fired through the barrel during its lifetime

5. Firing reports section

a. File of all firing reports in chronological order

b. Valuable reference for future use

6. Test equipment section

a. Serial number

b. Location

c. Last calibration date

d. Calibration due date

e. Weight test data if required

7. Shipboard Configuration Integrated Logistics Support Information System (SCLSIS)

a. The SCLSIS section contains an inventory of combat systems equipment.

b. The SCLSIS program provides a complete inventory of all ship's equipment by serial number, manufacturer, and location.