CHOY, Circuit Judge:

I

Arizona Public Service Company (the Company) is a natural gas and electricity utility serving customers throughout Arizona. The Company's electrical system generates power at several plants, and it buys and sells electrical power pursuant to contracts with other southwestern utilities. The Company headquarters are in Phoenix, and a smaller office is maintained in Flagstaff. Since 1945, the Company has recognized the International Brotherhood of Electrical Workers, Local Union No. 387 (the Union) as the exclusive bargaining representative of its production and maintenance employees.

In 1969, the Union sought an NLRB order directing an election among the Company's nine System Load Supervisors (Supervisors) and ten assistant System Load Supervisors (Assistants or Assistant Supervisors). The Company resisted arguing that these employees were all "supervisors" within the meaning of § 2(11) of the National Labor Relations Act, 29 U.S.C. § 152(11), (the Act), and not entitled to the Act's protection. Relying on The Connecticut Light Power Co., 121 N.L.R.B. 768 (1958), the Board unanimously held that neither the Supervisors nor the Assistant Supervisors responsibly directed other employees and that, therefore, they were not § 2(11) "supervisors." 182 N. L.R.B. #72 (1970). The Board then directed an election, which the Union won. The Supervisors and Assistants were then included, in compliance with the Board's order, within the production and maintenance bargaining unit, and the Union was certified as their exclusive bargaining representative.

The Company, however, refused to bargain with the Union as the representatives of these employees. The Union petitioned for a Board order directing the Company to bargain. Although the Company contended that since the representation proceedings, it had altered and clarified the status and duties of the Supervisors and Assistant Supervisors to make them more clearly statutory "supervisors," the Board entered summary judgment for the Union, finding that the Company had engaged in unfair labor practices and ordered the Company to bargain with the Union. 188 N.L.R.B. #1 (1970). The Company again refused, and petitioned under § 10(f), 29 U.S.C. § 160(f), for review of the Board's order. The Board cross-petitioned for enforcement of its order under § 10(e), 29 U.S.C. § 160(e). We deny enforcement because the employees in question are supervisors within the meaning of § 2(11).

II

The National Labor Relations Act protects the self-organization and collective bargaining of "employees," which term excludes ". . . any individual employed as a supervisor." § 2(3), 29 U.S.C. § 152(3). "Supervisor" is in turn defined in § 2(11).

"(11) The term `supervisor' means any individual having authority, in the interest of the employer, ( 1) to hire, transfer, suspend, lay off, recall, promote, discharge, assign, reward, or discipline other employees, or ( 2) responsibility to direct them, or ( 3) to adjust their grievances, or ( 4) effectively to recommend such action, ( 5) if in connection with the foregoing the exercise of such authority is not of a merely routine or clerical nature, but requires the use of independent judgment." (italicized numbers added)

Section 2(11) is to be read in the disjunctive, and the presence of any one of the enumerated powers is sufficient to render an employee a "supervisor." N. L.R.B. v. Fullerton Publishing Co., 283 F.2d 545, 548 (9th Cir. 1960). The statute turns upon the existence of a power and not the frequency of its utilization. For example, an employee who has the power to fire and hire other employees is nonetheless a supervisor though he has never exercised that power. See Ohio Power Co. v. N.L.R.B., 176 F.2d 385 (6th Cir. 1949). While the statutory tests are clear, the ultimate determination of supervisory status depends upon a close scrutiny of the job actually performed by the employees in question. The Board is accorded a large measure of discretion in weighing the subtle differences between jobs, and its determination is accorded considerable judicial deference. N. L. R. B. v. Swift and Co., 292 F.2d 561 (1st Cir. 1961). However, the Board's finding of fact that the employees are not supervisors is subject to the scrutiny of judicial review. Universal Camera Corp. v. N.L.R.B., 340 U.S. 474, 71 S.Ct. 456, 95 L.Ed. 456 (1951). Only if we can conscientiously say that the record considered as a whole supports the Board's finding must we affirm. Universal Camera, supra, at 488, 71 S.Ct. 456, 95 L.Ed. 456.

III

The Company does not contend that the Supervisors and Assistant Supervisors have the authority to "hire, transfer, suspend, lay off, recall, promote, discharge, assign, reward, or discipline other employees," or the power effectively to recommend such action. It does say, however, that these employees have the authority responsibly to direct other employees and such direction is not routine. We agree.

The Company's Supervisors and Assistant Supervisors have very few of the outward indicia of supervisory status. A license is not required for their position and the sole scholastic proficiency desired is a knowledge of mathematics. They receive on-the-job training. Although regular meetings are held to discuss the problems and procedures of the system, these are not training meetings, and neither the Supervisors nor the Assistant Supervisors attend meetings of the Company's managerial staff. They have no hand in determining Company policy.

In the abstract, it may seem that these employees perform routine functions requiring skill and ability, but do little more than supervise the use of sophisticated machines. However, the record as a whole, extending beyond static job descriptions, demonstrates that these employees have supervisory authority.

First, the Company considers these men supervisors. Thomas G. Woods, Jr., vice-president of management services, testified that the Supervisors had a "clear delegated authority over virtually everybody in the company." And W. P. Reilly, the Company's president, stated that the Company delegated authority to the Supervisors in System Load Dispatch ". . . to operate the system, operate it efficiently, to operate it in the best economic manner and in a safe manner . . ." Reilly said that the Supervisors exercised this power on a day-to-day basis, and other employees were instructed to comply promptly with SLD directives.

Second, the Company's other employees consider these men supervisors. Lawrence Eaglin, an area manager who is in constant contact with SLD, instructs his men to obey SLD orders and testified that they never were, in fact, disobeyed. Priority is given all SLD calls, and there is frequent direct contact between SLD and field employees. The linemen ". . . may have disagreed [with an order] but I don't know of anyone that ever disobeyed an order from SLD . . . [b]ecause they have the final say — they have the control over everything so they are the final word." One of the Supervisors testified that in his experience no one had ever failed to carry out any of his instructions or requests.

Third, and most important, the Supervisors and Assistant Supervisors responsibly direct employees in the field after business hours and during emergencies. We defined "responsibly" in N.L.R.B. v. Fullerton Publishing Co., 283 F.2d 545, 549 (9th Cir. 1960), quoting with approval Ohio Power Co. v. N.L.R.B., 176 F.2d 385, 387 (6th Cir. 1949).

"To be responsible is to be answerable for the discharge of a duty or obligation. Responsibility includes judgment, skill, ability, capacity, and integrity, and is implied by power."

The jobs in question require judgment, skill, ability, capacity, and integrity. The Company's electrical system is often under the sole and complete control of these employees. They decide when and how much electricity to buy or sell. They decide what priority is to be given to repair requests. They choose which linemen are to work, when and where. Field employees obey their directives. When there is no immediate threat to life or property and a superior is available, these employees will discuss a course of action with their superior. However, after hours or in emergencies, the Supervisor is authorized to and does by-pass the normal chain of command.

The Board argues that while these jobs may require skill and judgment, their operation is routine, requiring only that the employees supervise machines and relay orders to field supervisors, who then supervise the actual execution of the directive. This was the case in The Connecticut Light Power Co., 121 N.L.R.B. 768 (1958), upon which the Board relies. In general outline, the Connecticut Light load dispatchers are not unlike the Company's Load Supervisors. However, operations in the Connecticut Light utility were governed by a detailed set of rules and procedures, including state public utilities commission regulations. The Board held Connecticut Light's employees were not supervisors, a position it has generally maintained in the cases cited in the margin.

On the other hand, the Company's Supervisors and Assistants are more than simple supervisors of machines. They effectively direct field operations during emergencies and after hours. The most revealing portion of the record before us is a condensed tape and transcript of approximately three hours of Supervisor operations on a Friday evening. The tape clearly documents a Supervisor exercising supervisory functions and responsibly directing linemen and servicemen. It reveals that the Supervisor's authority responsibly to direct other employees is "not weak or jejune but import[s] active vigor and potential vitality." N.L.R.B. v. Security Guard Service, Inc., 384 F.2d 143, 147 (5th Cir. 1967). While directing the ordinary repair operations and giving clearances for de-energized lines, testing faulty lines, and locating defects, the Supervisor, ignoring the chain of command, himself directed the vast operations necessary to return service to customers during a summer electrical storm.

The tape indicates that in an emergency — and such summer storms are frequent in Arizona — the Supervisor has the power to requisition any man on the spot and to direct his movement. He can direct substantially every man employed by the Company. See Ohio Power Co., supra. He has the authority to decide without consulting anyone whether or not a line can be de-energized, the final authority to determine the feasibility of repairs, and the ability to call linemen out for overtime. Cf., West Penn Power Co. v. N.L.R.B. 337 F.2d 993 (3rd Cir. 1964) (managerial personnel). They do far more than assign jobs according to a list before them or relay orders from their superiors. See N.L.R.B. v. Whitin Machine Works, 204 F.2d 883 (1st Cir. 1953); Precision Fabricators, Inc. v. N.L.R.B., 204 F.2d 567 (2d Cir. 1953); and cases collected in note 8 supra. The Company's Supervisors handle most emergencies on their own; they do not implement instructions from others. Compare Texas Electrical Service Co., 77 N.L.R.B. 1258 (1948). Nor are there comprehensive regulations and guidelines which limit the area of individual judgment. Compare Connecticut Light, supra. Finally, the Supervisor's directions to subordinates are far more than the "necessary incidents of the application of their technical know-how." Westinghouse Electric Corp. v. N.L.R.B., 424 F.2d 1151, 1156 (7th Cir. 1970).

More helpful than the utility cases on which the Board relies are cases involving bus and transportation dispatchers. In these cases emphasis is placed on the supervisors' role during emergencies caused by weather, mechanical failure, and personnel problems. When he is alone in the terminal, the bus dispatcher, like the Supervisor after hours, must juggle routes, maneuver men, depart from routine operators whenever he feels it is warranted. Of necessity, the Supervisors here responsibly direct the men in the field, sometimes routing directives through nominal superiors. The effective exercise of authority is nonetheless supervisory though it is passed on through another supervisory employee. Eastern Greyhound Lines v. N.L.R.B., 337 F.2d 84, 87 (6th Cir. 1964). Nor is it less supervisory power because it is couched in non-demanding terms.

Accordingly, the Board's Decision and Order as supplemented is reversed.

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"(5) to refuse to bargain collectively with the representatives of his employees . . ."