Narrative:

Aircraft X called ready to go for touch and go. I cleared aircraft X for takeoff with right close traffic. I did not get the ATIS and I did not identify the position I was at (lhd tower). I did not hear aircraft X say mri tower. I had another aircraft on frequency cleared to land on runway 32. I was trying to obtain the position of aircraft X. I did not see them and cancelled their takeoff clearance and had them hold short. They read back 'cancelling' instead of hold short. I asked the arriving aircraft if they see the aircraft awaiting departure because I did not have them in sight. Aircraft Y stated that they did not have them in sight either. Once aircraft Y landed aircraft X said was he cleared to land we were cleared for takeoff (at this time I had other controllers in the tower helping me find this aircraft that no one could see. I informed aircraft X that they were told to hold and cancel takeoff clearance. Aircraft X said sorry. I verified that the aircraft was at lhd. Aircraft X stated yes we are located at lhd. I cleared aircraft X for takeoff runway 32 I still did not observe the aircraft. Aircraft X stated that they were departing for lhd at this time I told aircraft X to 'say your position please.' I identified that I was lhd tower and had given her a clearance for takeoff and I did not see her and to just verify her position. At this time aircraft X stated that she was on the wrong frequency 'I'm sorry'. I again asked aircraft X to say position; at this time she said that she had taken off from mri. I immediately called mri tower and advised them that aircraft X was on my frequency and had just taken off. They asked that I send her to mri frequency I stated I will after I issue the brasher warning. I issued the warning but aircraft X just said affirmative and switched frequency back to mri. Aircraft X landed at lhd.since lhd and mri frequency are so alike 126.8 and 126.0 many student pilots are confusing the frequency for mri and lhd.

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Original NASA ASRS Text

Title: LHD and MRI Controller's report of an aircraft at MRI airport on the ground; talking to LHD Controller's asking for takeoff clearance. LHD Controller clears aircraft for takeoff and at MRI the Controller sends an aircraft around because the aircraft was close to the runway.

Narrative: Aircraft X called ready to go for touch and go. I cleared Aircraft X for takeoff with right close traffic. I did not get the ATIS and I did not identify the position I was at (LHD tower). I did not hear Aircraft X say MRI tower. I had another aircraft on frequency cleared to land on runway 32. I was trying to obtain the position of Aircraft X. I did not see them and cancelled their takeoff clearance and had them hold short. They read back 'cancelling' instead of hold short. I asked the arriving aircraft if they see the aircraft awaiting departure because I did not have them in sight. Aircraft Y stated that they did not have them in sight either. Once Aircraft Y landed Aircraft X said was he cleared to land we were cleared for takeoff (at this time I had other controllers in the tower helping me find this aircraft that no one could see. I informed Aircraft X that they were told to hold and cancel takeoff clearance. Aircraft X said sorry. I verified that the aircraft was at LHD. Aircraft X stated yes we are located at LHD. I cleared Aircraft X for takeoff runway 32 I still did not observe the aircraft. Aircraft X stated that they were departing for LHD at this time I told Aircraft X to 'say your position please.' I identified that I was LHD tower and had given her a clearance for takeoff and I did not see her and to just verify her position. At this time Aircraft X stated that she was on the wrong frequency 'I'm sorry'. I again asked Aircraft X to say position; at this time she said that she had taken off from MRI. I immediately called MRI tower and advised them that Aircraft X was on my frequency and had just taken off. They asked that I send her to MRI frequency I stated I will after I issue the brasher warning. I issued the warning but Aircraft X just said affirmative and switched frequency back to MRI. Aircraft X landed at LHD.Since LHD and MRI frequency are so alike 126.8 and 126.0 many student pilots are confusing the frequency for MRI and LHD.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.