theodolites - 2026 ACF Regionals

Question

Answer following about surveying, the task of positioning points on Earth, for 10 points each.

[10h] Modern surveying is typically done with a total station, which is one of these devices equipped with an electronic distance measurement system. These devices consist of a mounted telescope used to measure angles.

ANSWER: theodolites [accept total station theodolites]

[10m] Theodolites are commonly used to perform levelling, the measurement of height relative to one of these points of references. The mean sea level is commonly used as one of these points for altitude.

ANSWER: datums [reject “data”] (The plural of “datum” is “datums” in this context.)

[10e] Mean sea level is preferred over instantaneous sea level as a vertical datum in part due to these phenomena. The gravity of the Sun and Moon cause these variations in sea surface height.

ANSWER: tides

<GC, Other Science>

Back to bonuses

Summary


California (North)	Main Site	Y	3	10.00	100%	0%	0%
California (South)	Main Site	Y	4	10.00	100%	0%	0%
Canada	Main Site	Y	12	14.17	100%	8%	33%
Florida	Main Site	Y	3	13.33	100%	33%	0%
Great Lakes	Main Site	Y	5	12.00	100%	0%	20%
Lower Mid-Atlantic	Main Site	Y	9	8.89	89%	0%	0%
Midwest	Main Site	Y	8	12.50	100%	0%	25%
Overflow	Main Site	Y	4	10.00	100%	0%	0%
South Central	Main Site	Y	2	15.00	100%	50%	0%
Southeast	Main Site	Y	7	15.71	100%	43%	14%
UK	Main Site	Y	12	14.17	92%	17%	33%
Upper Mid-Atlantic	Main Site	Y	8	13.75	100%	13%	25%
Upstate NY	Main Site	Y	4	10.00	100%	0%	0%

Data


UCLA B	UCSD C	0	0	10	10
Berkeley D	Berkeley B	0	0	10	10
Berkeley A	Stanford A	0	0	10	10
Stanford B	Berkeley C	0	0	10	10
UCSD B	UC Irvine	0	0	10	10
UC Santa Barbara	Arizona State	0	0	10	10
UCLA A	UCSD A	0	0	10	10
Brock	Toronto G	0	0	10	10
Carleton University	Guelph	0	0	10	10
Toronto B	McMaster A	0	0	10	10
McMaster B	Western B	0	0	10	10
McGill B	Toronto C	10	0	10	20
Toronto F	Toronto D	0	0	10	10
Toronto E	McGill A	0	0	10	10
Ottawa	UBC A	0	0	10	10
UBC B	Waterloo B	0	0	10	10
Waterloo A	Queen's	10	10	10	30
Western A	Toronto Metropolitan	10	0	10	20
Western C	Simon Fraser	10	0	10	20
Central Florida A	Florida B	0	0	10	10
Central Florida B	Florida A	0	10	10	20
Central Florida C	Florida C	0	0	10	10
Michigan C	CWRU B	0	0	10	10
CWRU A	Michigan A	0	0	10	10
Michigan B	Pittsburgh	0	0	10	10
Ohio State A	Ohio State B	0	0	10	10
Michigan State	Ohio State C	10	0	10	20
Liberty A	NC State B	0	0	10	10
Duke	South Carolina B	0	0	10	10
North Carolina C	James Madison B	0	0	10	10
William and Mary	Virginia Tech A	0	0	10	10
Virginia Tech B	Wake Forest	0	0	10	10
NC State A	North Carolina A	0	0	10	10
North Carolina B	James Madison A	0	0	10	10
Liberty C	South Carolina A	0	0	0	0
VCU	Liberty B	0	0	10	10
Chicago D	Illinois C	0	0	10	10
Chicago A	Northwestern C	10	0	10	20
Chicago C	Indiana B	0	0	10	10
Notre Dame A	Purdue B	0	0	10	10
Chicago B	Notre Dame B	0	0	10	10
Indiana A	Chicago E	10	0	10	20
Illinois A	Indiana C	0	0	10	10
Northwestern D	Illinois B	0	0	10	10
Georgia Tech A	Carleton College	0	0	10	10
Claremont	Missouri B	0	0	10	10
Texas A	Texas A&M A	0	0	10	10
Texas B	Murray State A	0	10	10	20
Missouri A	Iowa State	0	0	10	10
Washington B	Minnesota A	0	0	10	10
Kentucky	Alabama B	0	0	10	10
Georgia Tech B	Tennessee B	0	10	10	20
Bruin	Louisville A	0	0	10	10
Georgia Tech D	WashU B	0	10	10	20
Cambridge C	Bristol	0	10	10	20
Birmingham	Cardiff	10	0	10	20
Edinburgh A	Southampton A	0	0	10	10
City St. George's	Imperial A	0	0	0	0
LSE	Imperial C	0	0	10	10
Imperial B	Manchester	10	10	10	30
Cambridge A	Montpellier	10	0	10	20
Edinburgh B	Oxford A	0	0	10	10
Oxford B	Cambridge B	0	0	10	10
UCL	Durham	10	0	10	20
Warwick A	Oxford C	0	0	10	10
Southampton B	Warwick B	0	0	10	10
Georgia Tech C	Sewanee	0	10	10	20
Columbia B	Maryland A	0	0	10	10
Georgetown	NYU A	0	0	10	10
NYU B	Johns Hopkins B	0	0	10	10
Rutgers A	NYU C	0	0	10	10
Catholic	Maryland C	0	0	10	10
John Jay	Swarthmore	10	0	10	20
Johns Hopkins A	Columbia C	10	10	10	30
Rutgers B	Vassar	0	0	10	10
Cornell A	Binghamton A	0	0	10	10
RIT	Binghamton B	0	0	10	10
Cornell B	Penn State	0	0	10	10
Rochester	Cornell C	0	0	10	10
Tennessee A	Vanderbilt B	0	0	10	10
WashU A	Louisville B	10	0	10	20