MorTab 60mm Mortar System
What is the preferred deflection of the alternate aiming stake?
0700
When direct laying the mortar what is the initial deflection?
3200 mils
How far away from ammunition must you be when smoking?
50 meters
How often should the mortar tube be swabbed during firing?
After every 10 rounds or after each fire mission
What are the 3 types of malfunctions?
Hang fire, misfire, cook-off
What is the primary means of laying the guns on the direction of fire?
M2 compass
What is the nomenclature of the cannon?
M225A1
What are the maximum and sustained rates of fire for the 60mm mortar firing the M720 round?
Max= 30 rnds per minute for 4 minutes, Substained= 20 rnds per minute indefinitely
During misfire procedures can you poor water into the barrel of any mortar system if it is hot?
No
What are the 4 function settings on the M734 multioption fuze and what do they mean?
PRX= proximity 1-3m AGL, NSB= near surface burst 0-1m AGL, IM= impact, DLY= delay .05 SEC
What are the minimum and maximum elevations in both the upper and lower saddle?
Upper Saddle: 0800-1100 Lower Saddle: 1101-1511
How many mils is one turn of the traversing hand wheel in both the upper and lower saddle?
Upper= 10 mils, Lower= 15 mils
Can a misfired round be refired if the primer is not dented?
Yes
What are the 7 safety checks on the 60mm mortar?
1. Check that the cannon is locked to the baseplate and the open end of the retaining cap points in the direction of fire 2. Check that firing sector on the handle and firing mechanism is set to D (drop fire) 3. Check that cannon is is secured with the recoil mechanism buffer in upper or lower saddle of the cannon and with knob on coupling half clamp tightened 4. Check that mask and overhead clearance are adequate (0800 and 1511 mils) 5. Check that cannon bore is clean and free of obstructions 6. Check that right (plain) bipod leg is locked into position 7. Check that block clamp knob is hand tight
How much does the M170A1 bipod weigh?
12.85 lbs
How many M4's wide is a stage 1 mortar pit?
2
What is the maximum range of the 60mm mortar in both handheld and conventional mode?
Conventional: 3490, Handheld: 1340
What deflection and elevation is set on the 60mm mortar sight when boresighting?
Deflection 3200, elevation 0800
What must you do if a misfire will not slide out of the tube?
Dismantle the mortar and move the tube to the dud pit
When boresighting what is the preferred method?
Distant aiming point
What are the 4 types of ammunition that the 60mm mortar can fire?
Hight explosive, white phosphorus, illumination, and training
What is the nomenclature for both the large and small baseplate and how much do they weight?
Large= M7A1, 9.2 lbs Small= M8, 3.7 lbs
What is the boresight that can be used only on the 60mm mortar system?
M115
If you are unable to see the aiming circle, what is the alternate method of doing reciprocal lay?
Sight to sight method
What is the radioactive gas that makes the night sights illuminate?
Tritium
